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Great Tit - adult female
Flew into the sunroom and in escaping the attentions of the Broon Dug, concussed itself on the windows.
Having instructed the dog “NO” I was able to pick it up in a towel and keep it calm inside the towel until it started to move a little. It then spent about 10 minutes in my hand, then perched, as the shocked hyperventilation slowly gave way to normal alertness.
After I wielded the macro flash camera in one hand with it now perched on a finger of my other hand, It shat on me three times, and flew off.
Of course all the settings were entirely wrong, but there is a strict limit to what one can adjust with one hand only.
Nerium oleander most commonly known as oleander or nerium, is a shrub or small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium, belonging to subfamily Apocynoideae of the dogbane family Apocynaceae. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.
Nerium grows to 2–6 metres (7–20 feet) tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.
Nerium contains several toxic compounds, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.
Description
Oleander grows to 2–6 metres (7–20 feet) tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom, while mature stems have a grayish bark. The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, 5–21 centimetres (2–8 inches) long and 1–3.5 cm (3⁄8–1+3⁄8 in) broad, and with an entire margin filled with minute reticulate venation web typical of eudicots. The leaves are light green and very glossy when young, maturing to a dull dark green.
The flowers grow in clusters at the end of each branch; they are white, pink to red, 2.5–5 cm (1–2 in) diameter, with a deeply 5-lobed fringed corolla round the central corolla tube. They are often, but not always, sweet-scented. The fruit is a long narrow pair of follicles 5–23 cm (2–9 in) long, which splits open at maturity to release numerous downy seeds.
Taxonomy
Nerium oleander is the only species currently classified in the genus Nerium. It belongs to (and gives its name to) the small tribe Nerieae of subfamily Apocynoideae of the dogbane family Apocynaceae. The genera most closely related thus include the equally ornamental (and equally toxic) Adenium G.Don and Strophanthus DC. - both of which contain (like oleander) potent cardiac glycosides that have led to their use as arrow poisons in Africa. The three remaining genera Alafia Thouars, Farquharia Stapf and Isonema R.Br. are less well-known in cultivation.
Synonymy
The plant has been described under a wide variety of names that are today considered its synonyms:
Oleander Medik.
Nerion Tourn. ex St.-Lag.
Nerion oleandrum St.-Lag.
Nerium carneum Dum.Cours.
Nerium flavescens Spin
Nerium floridum Salisb.
Nerium grandiflorum Desf.
Nerium indicum Mill.
Nerium japonicum Gentil
Nerium kotschyi Boiss.
Nerium latifolium Mill.
Nerium lauriforme Lam.
Nerium luteum Nois. ex Steud.
Nerium madonii M.Vincent
Nerium mascatense A.DC.
Nerium odoratissimum Wender.
Nerium odoratum Lam.
Nerium odorum Aiton
Nerium splendens Paxton
Nerium thyrsiflorum Paxton
Nerium verecundum Salisb.
Oleander indica (Mill.) Medik.
Oleander vulgaris Medik.
Etymology
The taxonomic name Nerium oleander was first assigned by Linnaeus in 1753. The genus name Nerium is the Latinized form of the Ancient Greek name for the plant nẽrion (νήριον), which is in turn derived from the Greek for water, nẽros (νηρός), because of the natural habitat of the oleander along rivers and streams.
The origins of the species name are disputed. The word oleander appears as far back as the first century AD, when the Greek physician Pedanius Dioscorides cited it as one of the terms used by the Romans for the plant. Merriam-Webster believes the word is a Medieval Latin corruption of Late Latin names for the plant: arodandrum or lorandrum, or more plausibly rhododendron (another Ancient Greek name for the plant), with the addition of olea because of the superficial resemblance to the olive tree (Olea europea) Another theory posited is that oleander is the Latinized form of a Greek compound noun: οllyo (ὀλλύω) 'I kill', and the Greek noun for man, aner, genitive andros (ἀνήρ, ἀνδρός). ascribed to oleander's toxicity to humans.
The etymological association of oleander with the bay laurel has continued into the modern day: in France the plant is known as "laurier rose", while the Spanish term, "Adelfa", is the descendant of the original Ancient Greek name for both the bay laurel and the oleander, daphne, which subsequently passed into Arabic usage and thence to Spain.
The ancient city of Volubilis in Morocco may have taken its name from the Berber name alili or oualilt for the flower.
Distribution and habitat
Nerium oleander is either native or naturalized to a broad area spanning from Northwest Africa and Iberian and Italian Peninsula eastward through the Mediterranean region and warmer areas of the Black Sea region, Arabian Peninsula, southern Asia, and as far east as Yunnan in southern parts of China. It typically occurs around stream beds in river valleys, where it can alternatively tolerate long seasons of drought and inundation from winter rains. N. oleander is planted in many subtropical and tropical areas of the world.
On the East Coast of the US, it grows as far north as Virginia Beach, while in California and Texas miles of oleander shrubs are planted on median strips. There are estimated to be 25 million oleanders planted along highways and roadsides throughout the state of California. Because of its durability, oleander was planted prolifically on Galveston Island in Texas after the disastrous Hurricane of 1900. They are so prolific that Galveston is known as the 'Oleander City'; an annual oleander festival is hosted every spring. Moody Gardens in Galveston hosts the propagation program for the International Oleander Society, which promotes the cultivation of oleanders. New varieties are hybridized and grown on the Moody Gardens grounds, encompassing every named variety.
Beyond the traditional Mediterranean and subtropical range of oleander, the plant can also be cultivated in mild oceanic climates with the appropriate precautions. It is grown without protection in warmer areas in Switzerland, southern and western Germany and southern England and can reach great sizes in London and to a lesser extent in Paris due to the urban heat island effect. This is also the case with North American cities in the Pacific Northwest like Portland, Seattle, and Vancouver. Plants may suffer damage or die back in such marginal climates during severe winter cold but will rebound from the roots.
Ecology
Some invertebrates are known to be unaffected by oleander toxins, and feed on the plants. Caterpillars of the polka-dot wasp moth (Syntomeida epilais) feed specifically on oleanders and survive by eating only the pulp surrounding the leaf-veins, avoiding the fibers. Larvae of the common crow butterfly (Euploea core) and oleander hawk-moth (Daphnis nerii) also feed on oleanders, and they retain or modify toxins, making them unpalatable to potential predators such as birds, but not to other invertebrates such as spiders and wasps.
The flowers require insect visits to set seed, and seem to be pollinated through a deception mechanism. The showy corolla acts as a potent advertisement to attract pollinators from a distance, but the flowers are nectarless and offer no reward to their visitors. They therefore receive very few visits, as typical of many rewardless flower species. Fears of honey contamination with toxic oleander nectar are therefore unsubstantiated.
Leaf scorch
A bacterial disease known as oleander leaf scorch (Xylella fastidiosa subspecies sandyi) has become a serious threat to the shrub since it was first noticed in Palm Springs, California, in 1992. The disease has since devastated hundreds of thousands of shrubs mainly in Southern California, but also on a smaller scale in Arizona, Nevada and Texas. The culprit is a bacterium which is spread via insects (the glassy-winged sharpshooter primarily) which feed on the tissue of oleanders and spread the bacteria. This inhibits the circulation of water in the tissue of the plant, causing individual branches to die until the entire plant is consumed.
Symptoms of leaf scorch infection may be slow to manifest themselves, but it becomes evident when parts of otherwise healthy oleanders begin to yellow and wither, as if scorched by heat or fire. Die-back may cease during winter dormancy, but the disease flares up in summer heat while the shrub is actively growing, which allows the bacteria to spread through the xylem of the plant. As such it can be difficult to identify at first because gardeners may mistake the symptoms for those of drought stress or nutrient deficiency.
Pruning out affected parts can slow the progression of the disease but not eliminate it. This malaise can continue for several years until the plant completely dies—there is no known cure. The best method for preventing further spread of the disease is to prune infected oleanders to the ground immediately after the infection is noticed.
The responsible pathogen was identified as the subspecies sandyi by Purcell et al., 1999.
Cultivation
Nerium oleander has a history of cultivation going back millennia, especially amongst the great ancient civilizations of the Mediterranean Basin. Some scholars believe it to be the rhodon (rose), also called the 'Rose of Jericho', mentioned in apocryphal writings (Ecclesiasticus XXIV, 13) dating back to between 450 and 180 BC.
The ancient Greeks had several names for the plant, including rhododaphne, nerion, rhododendron and rhodon. Pliny confirmed that the Romans had no Latin word for the plant, but used the Greek terms instead. Pedanius Dioscorides states in his 1st century AD pharmacopeia De Materia Medica that the Romans used the Greek rhododendron but also the Latin Oleander and Laurorosa. The Egyptians apparently called it scinphe, the North Africans rhodedaphane, and the Lucanians (a southern Italic people) icmane.
Both Pliny and Dioscorides stated that oleander was an effective antidote to venomous snake bites if mixed with rue and drunk. However, both rue and oleander are poisonous themselves, and consuming them after a venomous snake bite can accelerate the rate of mortality and increase fatalities.
A 2014 article in the medical journal Perspectives in Biology and Medicine posited that oleander was the substance used to induce hallucinations in the Pythia, the female priestess of Apollo, also known as the Oracle of Delphi in Ancient Greece. According to this theory, the symptoms of the Pythia's trances (enthusiasmos) correspond to either inhaling the smoke of or chewing small amounts of oleander leaves, often called by the generic term laurel in Ancient Greece, which led to confusion with the bay laurel that ancient authors cite.
In his book Enquiries into Plants of circa 300 BC, Theophrastus described (among plants that affect the mind) a shrub he called onotheras, which modern editors render oleander: "the root of onotheras [oleander] administered in wine", he alleges, "makes the temper gentler and more cheerful".
The root of onotheras [oleander] administered in wine makes the temper gentler and more cheerful. The plant has a leaf like that of the almond, but smaller, and the flower is red like a rose. The plant itself (which loves hilly country) forms a large bush; the root is red and large, and, if this is dried, it gives off a fragrance like wine.
In another mention, of "wild bay" (Daphne agria), Theophrastus appears to intend the same shrub.
Oleander was a very popular ornamental shrub in Roman peristyle gardens; it is one of the flora most frequently depicted on murals in Pompeii and elsewhere in Italy. These murals include the famous garden scene from the House of Livia at Prima Porta outside Rome, and those from the House of the Wedding of Alexander and the Marine Venus in Pompeii.
Carbonized fragments of oleander wood have been identified at the Villa Poppaea in Oplontis, likewise buried by the eruption of Mount Vesuvius in 79 AD. They were found to have been planted in a decorative arrangement with citron trees (Citrus medica) alongside the villa's swimming pool.
Herbaria of oleander varieties are compiled and held at the Smithsonian Institution in Washington, D.C., and at Moody Gardens in Galveston, Texas.
Ornamental gardening
Oleander is a vigorous grower in warm subtropical regions, where it is extensively used as an ornamental plant in parks, along roadsides and in private gardens. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. Hardy versions like white, red and pink oleander will tolerate occasional light frost down to −10 °C (14 °F), though the leaves may be damaged. The toxicity of oleander renders it deer-resistant and its large size makes for a good windbreak – as such it is frequently planted as a hedge along property lines and in agricultural settings.
The plant is tolerant of poor soils, intense heat, salt spray, and sustained drought – although it will flower and grow more vigorously with regular water. Although it does not require pruning to thrive and bloom, oleander can become unruly with age and older branches tend to become gangly, with new growth emerging from the base. For this reason gardeners are advised to prune mature shrubs in the autumn to shape and induce lush new growth and flowering for the following spring. Unless they wish to harvest the seeds, many gardeners choose to prune away the seedpods that form on spent flower clusters, which are a drain on energy. Propagation can be made from cuttings, where they can readily root after being placed in water or in rich organic potting material, like compost.
In Mediterranean climates oleanders can be expected to bloom from April through October, with the heaviest bloom usually occurring between May and June. Free-flowering varieties like 'Petite Salmon' or 'Mont Blanc' require no period of rest and can flower continuously throughout the year if the weather remains warm.
In cold winter climates, oleander is a popular summer potted plant readily available at most nurseries. They require frequent heavy watering and fertilizing as compared to being planted in the ground, but oleander is nonetheless an ideal flowering shrub for patios and other spaces with hot sunshine. During the winter they should be moved indoors, ideally into an unheated greenhouse or basement where they can be allowed to go dormant. Once they are dormant they require little light and only occasional watering. Placing them in a space with central heating and poor air flow can make them susceptible to a variety of pests – aphids, mealybugs, oleander scale, whitefly and spider mites.
Colors and varieties
Oleander flowers are showy, profuse, and often fragrant, which makes them very attractive in many contexts. Over 400 cultivars have been named, with several additional flower colors not found in wild plants having been selected, including yellow, peach and salmon. Many cultivars, like 'Hawaii' or 'Turner's Carnival', are multi-colored, with brilliant striped corollas. The solid whites, reds and a variety of pinks are the most common. Double flowered cultivars like 'Mrs. Isadore Dyer' (deep pink), 'Mathilde Ferrier' (yellow) or 'Mont Blanc' (white) are enjoyed for their large, rose-like blooms and strong fragrance. There is also a variegated form, 'Variegata', featuring leaves striped in yellow and white. Several dwarf cultivars have also been developed, offering a more compact form and size for small spaces. These include 'Little Red', 'Petite White', 'Petite Pink' and 'Petite Salmon', which grow to about 8 feet (2.4 m) at maturity.
Toxicity
Oleander has historically been considered a poisonous plant because of toxic compounds it contains, especially when consumed in large amounts. Among these compounds are oleandrin and oleandrigenin, known as cardiac glycosides, which are known to have a narrow therapeutic index and are toxic when ingested.
Toxicity studies of animals concluded that birds and rodents were observed to be relatively insensitive to the administered oleander cardiac glycosides. Other mammals, however, such as dogs and humans, are relatively sensitive to the effects of cardiac glycosides and the clinical manifestations of "glycoside intoxication".
In reviewing oleander toxicity cases seen in-hospital, Lanford and Boor concluded that, except for children who might be at greater risk, "the human mortality associated with oleander ingestion is generally very low, even in cases of moderate intentional consumption (suicide attempts)." In 2000, a rare instance of death from oleander poisoning occurred when two toddlers adopted from an orphanage ate the leaves from a neighbor's shrub in El Segundo, California. Because oleander is extremely bitter, officials speculated that the toddlers had developed a condition caused by malnutrition, pica, which causes people to eat otherwise inedible material.
Effects of poisoning
Ingestion of this plant can affect the gastrointestinal system, the heart, and the central nervous system. The main effect of cardiotoxic glycosides is positive inotropy. Glycosides bind to the sarcolemma transmembrane ATPase of cardiac muscle cells and compete with K+ ions, inactivating the enzyme. This results in an accumulation of Na+ and Ca2+ ions into the cardiac muscle cells, leading to stronger and faster heart contractions. Moreover, the increased amount of extracellular K+ ions may lead to lethal hyperkalemia. Therefore, clinical features of oleander poisoning are similar to digoxin toxicity and include nausea, diarrhea, and vomiting due to stimulation of the area postrema of the medulla oblongata, neuropsychic disorders, and pathological motor manifestations. Cardiotoxic glycosides are also responsible for stimulating the vagus nerve (leading to sinus bradycardia) and the phrenic nerve (leading to hyperventilation), and lethal brady- and tachyarrhythmias, including asystole and ventricular fibrillation. Oleander poisoning can also result in blurred vision, and vision disturbances, including halos appearing around objects. Oleander sap can cause skin irritations, severe eye inflammation and irritation, and allergic reactions characterized by dermatitis.
The severity of the intoxication can vary based on the quantity ingested and an individual's physiological response, as well as the time of symptom onset after oleander ingestion: they can rapidly occur after drinking teas prepared with oleander leaves or roots or develop more slowly due to the ingestion of unprepared plant parts.
Treatment
Poisoning and reactions to oleander plants are evident quickly, requiring immediate medical care in suspected or known poisonings of both humans and animals. Induced vomiting and gastric lavage are protective measures to reduce absorption of the toxic compounds. Activated carbon may also be administered to help absorb any remaining toxins. Further medical attention may be required depending on the severity of the poisoning and symptoms. Temporary cardiac pacing will be required in many cases (usually for a few days) until the toxin is excreted.
Digoxin immune fab is the best way to cure an oleander poisoning if inducing vomiting has no or minimal success, although it is usually used only for life-threatening conditions due to side effects.
Drying of plant materials does not eliminate the toxins. It is also hazardous for animals such as sheep, horses, cattle, and other grazing animals, with as little as 100 g being enough to kill an adult horse. Plant clippings are especially dangerous to horses, as they are sweet. In July 2009, several horses were poisoned in this manner from the leaves of the plant. Symptoms of a poisoned horse include severe diarrhea and abnormal heartbeat. Aśvamāra (अश्वमार) in Sanskrit refers to this plant, meaning Aśva ‘horse’ and Māra ‘killing’. There is a wide range of toxins and secondary compounds within oleander, and care should be taken around this plant due to its toxic nature. Different names for oleander are used around the world in different locations, so, when encountering a plant with this appearance, regardless of the name used for it, one should exercise great care and caution to avoid ingestion of any part of the plant, including its sap and dried leaves or twigs. The dried or fresh branches should not be used for spearing food, for preparing a cooking fire, or as a food skewer. Many of the oleander relatives, such as the desert rose (Adenium obesum) found in East Africa, have similar leaves and flowers and are equally toxic.
Research
Drugs derived from N. oleander have been investigated as a treatment for cancer, but have failed to demonstrate clinical utility. According to the American Cancer Society, the trials conducted so far have produced no evidence of benefit, while they did cause adverse side effects.
Culture
In a research study done by Haralampos V. Harissis, he claims that the laurel the Pythia is commonly depicted with is actually an oleander plant, and the poisonous plant and its subsequent hallucinations are the source of the oracle's mystical power and subsequent prophecies. Many of the symptoms that primary sources such as Plutarch and Democritus report align with results of oleander poisoning. Harissis also provides evidence claiming that the word laurel may have been used to describe an oleander leaf.
Folklore
The toxicity of the plant makes it the center of an urban legend documented on several continents and over more than a century. Often told as a true and local event, typically an entire family, or in other tellings a group of scouts, succumbs after consuming hot dogs or other food roasted over a campfire using oleander sticks. Some variants tell of this happening to Napoleon's or Alexander the Great's soldiers.
There is an ancient account mentioned by Pliny the Elder in his Natural History, who described a region in Pontus in Turkey where the honey was poisoned from bees having pollinated poisonous flowers, with the honey left as a poisonous trap for an invading army. The flowers have sometimes been mis-translated as oleander, but oleander flowers are nectarless and therefore cannot transmit any toxins via nectar. The actual flower referenced by Pliny was either Azalea or Rhododendron, which is still used in Turkey to produce a hallucinogenic honey.
Oleander is the official flower of the city of Hiroshima, having been the first to bloom following the atomic bombing of the city in 1945.
In painting
Oleander was part of subject matter of paintings by famous artists including:
Gustav Klimt, who painted "Two Girls with an Oleander" between 1890 and 1892.
Vincent van Gogh painted his famous "Oleanders" in Arles in 1888. Van Gogh found the flowers "joyous" and "life-affirming" because of their inexhaustible blooms and vigour.
Anglo-Dutch artist Sir Lawrence Alma-Tadema incorporated oleanders into his classically inspired paintings, including "An Oleander" (1882), "Courtship", "Under the Roof of Blue Ionian Weather" and "A Roman Flower Market" (1868).
"The Terrace at Méric (Oleanders)", an 1867 Impressionist painting by Frédéric Bazille.
In literature, film and music
Janet Fitch's 1999 novel White Oleander is centered around a young Southern California girl's experiences growing up in foster care after her mother is imprisoned for poisoning an ex-boyfriend with the plant. The book was adapted into a 2002 film of the same name starring Michelle Pfeiffer and Alison Lohman.
In the 17th century AD Farsi-language book the Jahangirnama, the Mughal emperor Jahangir passes a stream overgrowing with oleanders along its banks. He orders the nobles in his train to adorn their turbans with oleander blossoms, creating a "field of flowers" on their heads.
Steely Dan's 1973 song "My Old School" contains the line "Oleanders growing outside her door, soon they're gonna be in bloom up in Annandale" in the second verse. It has been theorized that this reference is either a metaphor for a harmful relationship, or marijuana, which is the subcontext of the song.
The Yeasayer song "I Am Chemistry" contains the refrain "My momma told me not to fool with oleander, and never handle the deadly quaker buttons again".
Indie rock band Mother Mother has a song called "Oleander" on their 2011 album Eureka.
In video games
Red Dead Redemption 2 features a deadly plant, oleander sage, which may be used to craft poisonous weapons, and is based on nerium oleander.
Yellow-billed stork
Geelbek ooievaar
Nimmersat
(Mycteria ibis)
The yellow-billed stork (Mycteria ibis), sometimes also called the wood stork or wood ibis, is a large African wading stork species in the family Ciconiidae. It is widespread in regions south of the Sahara and also occurs in Madagascar.
The yellow-billed stork is closely related to 3 other species in the genus Mycteria: the American woodstork (Mycteria americana), the milky stork (Mycteria cinerea) and the painted stork (Mycteria leucocephala). It is classified as belonging to one clade with these 3 other species because they all display remarkable homologies in behavior and morphology. In one analytical study of feeding and courtship behaviours of the wood-stork family, M.P. Kahl attributed the same general ethology to all members of the genus Mycteria, with few species-specific variations. These four species are collectively referred to as the wood-storks, which should not be confused with one alternative common name (wood-stork) for the yellow-billed stork.
Before it was established that the yellow-billed stork was closely related to the American woodstork, the former was classified as belonging to the genus Ibis, together with the milky stork and painted stork. However, the yellow-billed stork has actually long been recognised as a true stork and along with the other 3 related stork species, it should not strictly be called an ibis.
It is a medium-sized stork standing 90–105 cm (35–41 in) tall. The body is white with a short black tail that is glossed green and purple when freshly moulted. The bill is deep yellow, slightly decurved at the end and has a rounder cross-section than in other stork species outside the Mycteria. Feathers extend onto the head and neck just behind the eyes, with the face and forehead being covered by deep red skin. Both sexes are similar in appearance, but the male is larger and has a slightly longer heavier bill. Males and females weigh approximately 2.3 kg (5.1 lb) and 1.9 kg (4.2 lb) respectively.
Colouration becomes more vivid during the breeding season. In the breeding season, the plumage is coloured pink on the upperwings and back; the ordinarily brown legs also turn bright pink; the bill becomes a deeper yellow and the face becomes a deeper red.
Juveniles are greyish-brown with a dull, partially bare, orange face and a dull yellowish bill. The legs and feet are brown and feathers all over the body are blackish-brown. At fledging, salmon-pink colouration in the underwings begins to develop and after about one year, the plumage is greyish-white. Flight feathers on the tail and wing also become black. Later, the pink colouration typical of adult plumage begins to appear.
These storks walk with a high-stepped stalking gait on the ground of shallow water and their approximate walking rate has been recorded as 70 steps per minute. They fly with alternating flaps and glides, with the speed of their flaps averaging 177–205 beats per minute.They usually flap only for short journeys and often fly in a soaring and gliding motion over several kilometres for locomotion between breeding colonies or roosts and feeding sites. By soaring on thermals and gliding by turns, they can cover large distances without wasting much energy. On descending from high altitudes, this stork has been observed to dive deeply at high speeds and flip over and over from side to side, hence showing impressive aerobatics. It even appears to enjoy these aerial stunts.
This species is generally non-vocal, but utters hissing falsetto screams during social displays in the breeding season. These storks also engage in bill clattering and an audible “woofing” wing beat at breeding colonies Nestlings make a loud continual monotonous braying call to beg parental adults for food.
The yellow-billed stork occurs primarily in Eastern Africa, but is widely distributed in areas extending from Senegal and Somalia down to South Africa and in some regions of western Madagascar. During one observation of a mixed species bird colony on the Tana River in Kenya, it was found to be the commonest species there, with 2000 individuals being counted at once.
It does not generally migrate far, at least not out of its breeding range; but usually makes short migratory movements which are influenced by rainfall. It makes local movements in Kenya and has also been found to migrate from North to South Sudan with the rainy season It may also migrate regularly to and from South Africa. However, little is actually known about this bird’s general migratory movements. Due to apparent observed variation in migratory patterns throughout Africa, the yellow-billed stork has been termed a facultative nomad. It may migrate simply to avoid areas where water or rainfall conditions are too high or too low for feeding on prey. Some populations migrate considerable distances between feeding or breeding sites; usually by using thermals to soar and glide. Other local populations have been found to be sedentary and remain in their respective habitats all year round.
Its preferred habitats include wetlands, shallow lakes and mudflats, usually 10–40 cm deep but it usually avoids heavily forested regions in central Africa. It also avoids flooded regions and deep expansive bodies of water because feeding conditions there are unsuitable for their typical grope and stir feeding techniques.
This species breeds especially in Kenya and Tanzania. Although it is known to breed in Uganda, breeding sites have not been recorded there. It has been found to breed also in Malakol in Sudan and often inside walled cities in West Africa from Gambia down to northern Nigeria. Still other breeding sites include Zululand in South Africa and northern Botswana,[12] but are rarer below northern Botswana and Zimbabwe where sites are well-watered. Although there is no direct evidence of current breeding in Madagascar, young birds unable to fly have been observed near Lake Kinkony during October.
Their diet comprises mainly small, freshwater fish of about 60-100mm length and maximally 150g, which they swallow whole. They also feed on crustaceans, worms, aquatic insects, frogs and occasionally small mammals and birds.
This species appears to rely mainly on sense of touch to detect and capture prey, rather than by vision. They feed patiently by walking through the water with partially open bills and probe the water for prey. Contact of the bill with a prey item is followed by a rapid snap-bill reflex, whereby the bird snaps shut its mandibles, raises its head and swallows the prey whole. The speed of this reflex in the closely related American woodstork (Mycteria americana) has been recorded as 25 milliseconds and although the corresponding reflex in the yellow-billed stork has not been quantitatively measured, the yellow-billed stork’s feeding mechanism appears to be at least qualitatively identical to that of the American woodstork.
In addition to the snap-bill reflex, the yellow-billed stork also uses a systematic foot stirring technique to sound out evasive prey. It prods and churns up the bottom of the water as part of a “herding mechanism” to force prey out of the bottom vegetation and into the bird’s bill. The bird does this several times with one foot before bringing it forwards and repeating with the other foot. Although they are normally active predators, they have also been observed to scavenge fish regurgitated by cormorants.
The yellow-billed stork has been observed to follow moving crocodiles or hippopotami through the water and feed behind them, appearing to take advantage of organisms churned up by their quarry. Feeding lasts for only a short time before the bird obtains its requirements and proceeds to rest again.
Parents feed their young by regurgitating fish onto the nest floor, whereupon it is picked up and consumed by the nestlings. The young eat voraciously and an individual nestling increases its body weight from 50 grams to 600 grams during the first ten days of its life. Hence, this species has earned the German colloquial common name “Nimmersatt”; meaning “never full”.
Breeding is seasonal and appears to be stimulated by the peak of long heavy rainfall and resultant flooding of shallow marshes, usually near Lake Victoria. This flooding is linked to an increase in prey fish availability; and reproduction is therefore synchronised with this peak in food availability. In such observations near Kisumu, M.P. Kahl’s explanation for this trend was that in the dry season, most prey fish are forced to leave the dried-up, deoxygenated marshes that cannot support them and retreat to the deep waters of Lake Victoria where the storks cannot reach them. However, fish move back up the streams on the onset of rain and spread out over the marshes to breed, where they become accessible to the storks. By nesting at this time and providing that the rains do not end pre-maturely, the storks are guaranteed a plentiful food supply for their young.
The yellow-billed stork may also begin nesting and breeding at the end of long rains. This occurs especially on flat extensive marshlands as water levels gradually decrease and concentrate fish sufficiently for the storks to feed on. However, unseasonal rainfall has also been reported to induce off-season breeding in northern Botswana and western and eastern Kenya. Rainfall may cause local flooding and hence ideal feeding conditions. This stork appears to breed simply when rainfall and local flooding are optimal and hence seems to be flexible in its temporal breeding pattern, which varies with rainfall pattern throughout the African continent.
As with all stork species, male yellow-billed storks select and occupy potential nest sites in trees, whereupon females attempt to approach the males. The yellow-billed stork has an extensive repertoire of courtship behaviours near and at the nest that may lead to pair formation and copulation. Generally, these courtship behaviours are also assumed to be common to all Mycteria species and show remarkable homology within the genus Mycteria. After the male has initially established at the nesting-site and the female begins to approach, he displays behaviours that advertise himself to her. One of these is the Display Preening, whereby the male pretends to strip down each of his extended wings with the bill several times each side and the bill does not effectively close around the feathers. Another observed display among males is the Swaying-Twig Grasping. Here, the male stands on the potential nesting-site and bends over to gently grasp and release underlying twigs at regular intervals. This is sometimes accompanied by side-to-side oscillations of the neck and head and he continues to pick at twigs in between such movements.
Reciprocally, approaching females display their own distinct behaviours. One such behaviour is the Balancing Posture, whereby she walks with a horizontal body axis and extended wings toward the male occupying the nesting-site. Later, when the female continues to approach or already stands near an established male, she may also engage in Gaping. Here, the bill is gaped open slightly with the neck inclined upward at about 45o . and often occurs in conjunction with the Balancing-Posture. This behaviour ordinarily continues if the male accepts the female and has allowed her to enter the nest, but the female usually closes her wings by this time. The male may also continue his Display-Preening when standing next to the female in the nest
During copulation, the male steps onto the female’s back from the side, hooks his feet over her shoulders, holds out his wings for balance and finally bends his legs to lower himself for cloacal contact, as happens in most birds. In turn, the female holds out her wings almost horizontally. The process is accompanied by bill clattering from the male as he regularly opens and closes his mandibles and vigorously shakes his head to beat his bill against the female’s. In turn, the female keeps her bill horizontal with the male’s or inclined downward at approximately 45 degrees.] Average copulation time in this species has been calculated as 15.7 seconds.
The male and female build the nest together either in high trees on dry land away from predators, or in small trees over water. Nest building takes up to 10 days. The nest may be 80–100 cm in diameter and 20–30 cm thick. The female typically lays 2-4 eggs (usually 3) on alternate days[ and average clutch size has been recorded as 2.5. The male and female share duties to incubate the eggs, which takes up to 30 days. As in many other stork species, hatching is asynchronous (usually at 1- to 2-day intervals), so that the young in the brood differ considerably in body size at any one time. During food shortage, the smaller young are at risk of being outcompeted for food by their larger nest-mates.
Both parents share duties of guarding and feeding the young until the latter are about 21 days old. Thereafter, both parents forage to attend to the young’s intense food demands. Alongside parental feeding by regurgitation of fish, parents have also been observed to regurgitate water into the open bills of their nestlings, especially on hot days. This may aid the typical thermoregulatory strategy of the young (common to all stork species) to excrete dilute urine down their legs in response to hot weather. Water regurgitated over the young serves as a water supplement in addition to fluid in their food, so that they have sufficient water to continue urinating down their legs to avoid hyperventilation. Additionally, parents sometimes help keep the young cool by shading them with their open wings.
The nestlings usually fledge after 50–55 days of hatching and fly away from the nest. However, after leaving the nest for the first time, the offspring often return there to be fed by their parents and roost with them for another 1–3 weeks. It is also thought that individuals are not fully adult until 3 years old and despite lack of data, new adults are thought to not breed until much later than this.
Fledglings have also been observed to not differ considerably in their foraging and feeding strategies from adults. In one investigation, four adult, hand-reared yellow-billed storks kept in captivity showed typical grope-feeding and foot stirring shortly after they were introduced to bodies of water. Hence, this suggests that such feeding techniques in this species are innate.
These birds breed colonially, often alongside other species; but the yellow-billed stork is sometimes the only occupant species of a nesting site. A subset of up to 20 individuals may nest close together in any one part of a colony; with several males occupying potential nest sites all in the same place. If many of these males do not acquire mates, the whole group moves on with the unpaired females to another tree. These “bachelor parties” are a noticeable feature of colonies of this species and usually consist of 12 or more males and at least as many females. As many as 50 nests have been counted all at once in a single breeding area.
Despite their gregariousness during breeding, most individuals generally ignore each other outside nesting-sites; although some hostile encounters may occur. Some of these encounters involve one individual showing an unambiguous attack or escape response if there is a large difference in social status between the two individuals. However, if two individuals are equally matched, they slowly approach each other and show a ritualised display called the Forward Threat. Here, one individual holds its body forward horizontally and retracts the neck so that it touches the crown, with the tail cocked at 45 degrees and all feathers erect. It approaches the opponent and points its bill at it, sometimes gaping. If the opponent does not capitulate, the attacker may grab at it with its bill and the two may briefly spar with their bills until one retreats in an erect stance with compressed plumage.
Hostility can also arise between opposite sexes when a female approaches a male on a potential nest site. Both sexes may display a similar aforementioned Forward Threat, but clatter their bills after grabbing with them at the other stork and extend their wings to maintain balance. Another hostile behaviour between sexes is the Snap Display,whereby they snap horizontally with their bills while standing upright. This may occur during and immediately after pair formation, but subsides later in the breeding cycle as the male and female become familiar with each other and it eventually disappears.
Nestlings show remarkable behavioural transformations at 3 weeks of age. During the constant parental attendance before this time, the young show little fear or aggression in response to intruders (such as a human observer), but are found to merely crouch low and quietly in the nest. After this time, when both parents go foraging and leave the young in the nest, a nestling shows strong fear in response to an intruder. It either attempts to climb out of the nest to escape or acts aggressively toward the intruder.
WIkipedia
I was bound and determined to use the pool even though the air temperature was in the 40's and the water was NOT heated. It was too late when we arrived so I got up early this morning and jumped in. After a short hyperventilation secondary to the cold, I was able to swim some laps. Setting the timer, I got this shot but it was not focused where I wanted it. This photo is first runner-up for the daily topic - underneath.
Fear of becoming trapped in an enclosed space
I wanted to show a type of claustrophobia though the use of a material that induces suffocation or hyperventilation, to symbolically represent the feeling of enclosed spaces, where the world seems as if it is closing in on you. The top part of the diptych expresses the double vision feeling of the this fear where the person feels as if they are slowly going insane. They were arraigned this way to complete what looks to be half of a face.
P.P.S. Mr. English, I used the magic filter :o
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Nerium oleander most commonly known as oleander or nerium, is a shrub or small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium, belonging to subfamily Apocynoideae of the dogbane family Apocynaceae. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.
Nerium grows to 2–6 metres (7–20 feet) tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.
Nerium contains several toxic compounds, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.
Description
Oleander grows to 2–6 metres (7–20 feet) tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom, while mature stems have a grayish bark. The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, 5–21 centimetres (2–8 inches) long and 1–3.5 cm (3⁄8–1+3⁄8 in) broad, and with an entire margin filled with minute reticulate venation web typical of eudicots. The leaves are light green and very glossy when young, maturing to a dull dark green.
The flowers grow in clusters at the end of each branch; they are white, pink to red, 2.5–5 cm (1–2 in) diameter, with a deeply 5-lobed fringed corolla round the central corolla tube. They are often, but not always, sweet-scented. The fruit is a long narrow pair of follicles 5–23 cm (2–9 in) long, which splits open at maturity to release numerous downy seeds.
Taxonomy
Nerium oleander is the only species currently classified in the genus Nerium. It belongs to (and gives its name to) the small tribe Nerieae of subfamily Apocynoideae of the dogbane family Apocynaceae. The genera most closely related thus include the equally ornamental (and equally toxic) Adenium G.Don and Strophanthus DC. - both of which contain (like oleander) potent cardiac glycosides that have led to their use as arrow poisons in Africa. The three remaining genera Alafia Thouars, Farquharia Stapf and Isonema R.Br. are less well-known in cultivation.
Synonymy
The plant has been described under a wide variety of names that are today considered its synonyms:
Oleander Medik.
Nerion Tourn. ex St.-Lag.
Nerion oleandrum St.-Lag.
Nerium carneum Dum.Cours.
Nerium flavescens Spin
Nerium floridum Salisb.
Nerium grandiflorum Desf.
Nerium indicum Mill.
Nerium japonicum Gentil
Nerium kotschyi Boiss.
Nerium latifolium Mill.
Nerium lauriforme Lam.
Nerium luteum Nois. ex Steud.
Nerium madonii M.Vincent
Nerium mascatense A.DC.
Nerium odoratissimum Wender.
Nerium odoratum Lam.
Nerium odorum Aiton
Nerium splendens Paxton
Nerium thyrsiflorum Paxton
Nerium verecundum Salisb.
Oleander indica (Mill.) Medik.
Oleander vulgaris Medik.
Etymology
The taxonomic name Nerium oleander was first assigned by Linnaeus in 1753. The genus name Nerium is the Latinized form of the Ancient Greek name for the plant nẽrion (νήριον), which is in turn derived from the Greek for water, nẽros (νηρός), because of the natural habitat of the oleander along rivers and streams.
The origins of the species name are disputed. The word oleander appears as far back as the first century AD, when the Greek physician Pedanius Dioscorides cited it as one of the terms used by the Romans for the plant. Merriam-Webster believes the word is a Medieval Latin corruption of Late Latin names for the plant: arodandrum or lorandrum, or more plausibly rhododendron (another Ancient Greek name for the plant), with the addition of olea because of the superficial resemblance to the olive tree (Olea europea) Another theory posited is that oleander is the Latinized form of a Greek compound noun: οllyo (ὀλλύω) 'I kill', and the Greek noun for man, aner, genitive andros (ἀνήρ, ἀνδρός). ascribed to oleander's toxicity to humans.
The etymological association of oleander with the bay laurel has continued into the modern day: in France the plant is known as "laurier rose", while the Spanish term, "Adelfa", is the descendant of the original Ancient Greek name for both the bay laurel and the oleander, daphne, which subsequently passed into Arabic usage and thence to Spain.
The ancient city of Volubilis in Morocco may have taken its name from the Berber name alili or oualilt for the flower.
Distribution and habitat
Nerium oleander is either native or naturalized to a broad area spanning from Northwest Africa and Iberian and Italian Peninsula eastward through the Mediterranean region and warmer areas of the Black Sea region, Arabian Peninsula, southern Asia, and as far east as Yunnan in southern parts of China. It typically occurs around stream beds in river valleys, where it can alternatively tolerate long seasons of drought and inundation from winter rains. N. oleander is planted in many subtropical and tropical areas of the world.
On the East Coast of the US, it grows as far north as Virginia Beach, while in California and Texas miles of oleander shrubs are planted on median strips. There are estimated to be 25 million oleanders planted along highways and roadsides throughout the state of California. Because of its durability, oleander was planted prolifically on Galveston Island in Texas after the disastrous Hurricane of 1900. They are so prolific that Galveston is known as the 'Oleander City'; an annual oleander festival is hosted every spring. Moody Gardens in Galveston hosts the propagation program for the International Oleander Society, which promotes the cultivation of oleanders. New varieties are hybridized and grown on the Moody Gardens grounds, encompassing every named variety.
Beyond the traditional Mediterranean and subtropical range of oleander, the plant can also be cultivated in mild oceanic climates with the appropriate precautions. It is grown without protection in warmer areas in Switzerland, southern and western Germany and southern England and can reach great sizes in London and to a lesser extent in Paris due to the urban heat island effect. This is also the case with North American cities in the Pacific Northwest like Portland, Seattle, and Vancouver. Plants may suffer damage or die back in such marginal climates during severe winter cold but will rebound from the roots.
Ecology
Some invertebrates are known to be unaffected by oleander toxins, and feed on the plants. Caterpillars of the polka-dot wasp moth (Syntomeida epilais) feed specifically on oleanders and survive by eating only the pulp surrounding the leaf-veins, avoiding the fibers. Larvae of the common crow butterfly (Euploea core) and oleander hawk-moth (Daphnis nerii) also feed on oleanders, and they retain or modify toxins, making them unpalatable to potential predators such as birds, but not to other invertebrates such as spiders and wasps.
The flowers require insect visits to set seed, and seem to be pollinated through a deception mechanism. The showy corolla acts as a potent advertisement to attract pollinators from a distance, but the flowers are nectarless and offer no reward to their visitors. They therefore receive very few visits, as typical of many rewardless flower species. Fears of honey contamination with toxic oleander nectar are therefore unsubstantiated.
Leaf scorch
A bacterial disease known as oleander leaf scorch (Xylella fastidiosa subspecies sandyi) has become a serious threat to the shrub since it was first noticed in Palm Springs, California, in 1992. The disease has since devastated hundreds of thousands of shrubs mainly in Southern California, but also on a smaller scale in Arizona, Nevada and Texas. The culprit is a bacterium which is spread via insects (the glassy-winged sharpshooter primarily) which feed on the tissue of oleanders and spread the bacteria. This inhibits the circulation of water in the tissue of the plant, causing individual branches to die until the entire plant is consumed.
Symptoms of leaf scorch infection may be slow to manifest themselves, but it becomes evident when parts of otherwise healthy oleanders begin to yellow and wither, as if scorched by heat or fire. Die-back may cease during winter dormancy, but the disease flares up in summer heat while the shrub is actively growing, which allows the bacteria to spread through the xylem of the plant. As such it can be difficult to identify at first because gardeners may mistake the symptoms for those of drought stress or nutrient deficiency.
Pruning out affected parts can slow the progression of the disease but not eliminate it. This malaise can continue for several years until the plant completely dies—there is no known cure. The best method for preventing further spread of the disease is to prune infected oleanders to the ground immediately after the infection is noticed.
The responsible pathogen was identified as the subspecies sandyi by Purcell et al., 1999.
Cultivation
Nerium oleander has a history of cultivation going back millennia, especially amongst the great ancient civilizations of the Mediterranean Basin. Some scholars believe it to be the rhodon (rose), also called the 'Rose of Jericho', mentioned in apocryphal writings (Ecclesiasticus XXIV, 13) dating back to between 450 and 180 BC.
The ancient Greeks had several names for the plant, including rhododaphne, nerion, rhododendron and rhodon. Pliny confirmed that the Romans had no Latin word for the plant, but used the Greek terms instead. Pedanius Dioscorides states in his 1st century AD pharmacopeia De Materia Medica that the Romans used the Greek rhododendron but also the Latin Oleander and Laurorosa. The Egyptians apparently called it scinphe, the North Africans rhodedaphane, and the Lucanians (a southern Italic people) icmane.
Both Pliny and Dioscorides stated that oleander was an effective antidote to venomous snake bites if mixed with rue and drunk. However, both rue and oleander are poisonous themselves, and consuming them after a venomous snake bite can accelerate the rate of mortality and increase fatalities.
A 2014 article in the medical journal Perspectives in Biology and Medicine posited that oleander was the substance used to induce hallucinations in the Pythia, the female priestess of Apollo, also known as the Oracle of Delphi in Ancient Greece. According to this theory, the symptoms of the Pythia's trances (enthusiasmos) correspond to either inhaling the smoke of or chewing small amounts of oleander leaves, often called by the generic term laurel in Ancient Greece, which led to confusion with the bay laurel that ancient authors cite.
In his book Enquiries into Plants of circa 300 BC, Theophrastus described (among plants that affect the mind) a shrub he called onotheras, which modern editors render oleander: "the root of onotheras [oleander] administered in wine", he alleges, "makes the temper gentler and more cheerful".
The root of onotheras [oleander] administered in wine makes the temper gentler and more cheerful. The plant has a leaf like that of the almond, but smaller, and the flower is red like a rose. The plant itself (which loves hilly country) forms a large bush; the root is red and large, and, if this is dried, it gives off a fragrance like wine.
In another mention, of "wild bay" (Daphne agria), Theophrastus appears to intend the same shrub.
Oleander was a very popular ornamental shrub in Roman peristyle gardens; it is one of the flora most frequently depicted on murals in Pompeii and elsewhere in Italy. These murals include the famous garden scene from the House of Livia at Prima Porta outside Rome, and those from the House of the Wedding of Alexander and the Marine Venus in Pompeii.
Carbonized fragments of oleander wood have been identified at the Villa Poppaea in Oplontis, likewise buried by the eruption of Mount Vesuvius in 79 AD. They were found to have been planted in a decorative arrangement with citron trees (Citrus medica) alongside the villa's swimming pool.
Herbaria of oleander varieties are compiled and held at the Smithsonian Institution in Washington, D.C., and at Moody Gardens in Galveston, Texas.
Ornamental gardening
Oleander is a vigorous grower in warm subtropical regions, where it is extensively used as an ornamental plant in parks, along roadsides and in private gardens. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. Hardy versions like white, red and pink oleander will tolerate occasional light frost down to −10 °C (14 °F), though the leaves may be damaged. The toxicity of oleander renders it deer-resistant and its large size makes for a good windbreak – as such it is frequently planted as a hedge along property lines and in agricultural settings.
The plant is tolerant of poor soils, intense heat, salt spray, and sustained drought – although it will flower and grow more vigorously with regular water. Although it does not require pruning to thrive and bloom, oleander can become unruly with age and older branches tend to become gangly, with new growth emerging from the base. For this reason gardeners are advised to prune mature shrubs in the autumn to shape and induce lush new growth and flowering for the following spring. Unless they wish to harvest the seeds, many gardeners choose to prune away the seedpods that form on spent flower clusters, which are a drain on energy. Propagation can be made from cuttings, where they can readily root after being placed in water or in rich organic potting material, like compost.
In Mediterranean climates oleanders can be expected to bloom from April through October, with the heaviest bloom usually occurring between May and June. Free-flowering varieties like 'Petite Salmon' or 'Mont Blanc' require no period of rest and can flower continuously throughout the year if the weather remains warm.
In cold winter climates, oleander is a popular summer potted plant readily available at most nurseries. They require frequent heavy watering and fertilizing as compared to being planted in the ground, but oleander is nonetheless an ideal flowering shrub for patios and other spaces with hot sunshine. During the winter they should be moved indoors, ideally into an unheated greenhouse or basement where they can be allowed to go dormant. Once they are dormant they require little light and only occasional watering. Placing them in a space with central heating and poor air flow can make them susceptible to a variety of pests – aphids, mealybugs, oleander scale, whitefly and spider mites.
Colors and varieties
Oleander flowers are showy, profuse, and often fragrant, which makes them very attractive in many contexts. Over 400 cultivars have been named, with several additional flower colors not found in wild plants having been selected, including yellow, peach and salmon. Many cultivars, like 'Hawaii' or 'Turner's Carnival', are multi-colored, with brilliant striped corollas. The solid whites, reds and a variety of pinks are the most common. Double flowered cultivars like 'Mrs. Isadore Dyer' (deep pink), 'Mathilde Ferrier' (yellow) or 'Mont Blanc' (white) are enjoyed for their large, rose-like blooms and strong fragrance. There is also a variegated form, 'Variegata', featuring leaves striped in yellow and white. Several dwarf cultivars have also been developed, offering a more compact form and size for small spaces. These include 'Little Red', 'Petite White', 'Petite Pink' and 'Petite Salmon', which grow to about 8 feet (2.4 m) at maturity.
Toxicity
Oleander has historically been considered a poisonous plant because of toxic compounds it contains, especially when consumed in large amounts. Among these compounds are oleandrin and oleandrigenin, known as cardiac glycosides, which are known to have a narrow therapeutic index and are toxic when ingested.
Toxicity studies of animals concluded that birds and rodents were observed to be relatively insensitive to the administered oleander cardiac glycosides. Other mammals, however, such as dogs and humans, are relatively sensitive to the effects of cardiac glycosides and the clinical manifestations of "glycoside intoxication".
In reviewing oleander toxicity cases seen in-hospital, Lanford and Boor concluded that, except for children who might be at greater risk, "the human mortality associated with oleander ingestion is generally very low, even in cases of moderate intentional consumption (suicide attempts)." In 2000, a rare instance of death from oleander poisoning occurred when two toddlers adopted from an orphanage ate the leaves from a neighbor's shrub in El Segundo, California. Because oleander is extremely bitter, officials speculated that the toddlers had developed a condition caused by malnutrition, pica, which causes people to eat otherwise inedible material.
Effects of poisoning
Ingestion of this plant can affect the gastrointestinal system, the heart, and the central nervous system. The main effect of cardiotoxic glycosides is positive inotropy. Glycosides bind to the sarcolemma transmembrane ATPase of cardiac muscle cells and compete with K+ ions, inactivating the enzyme. This results in an accumulation of Na+ and Ca2+ ions into the cardiac muscle cells, leading to stronger and faster heart contractions. Moreover, the increased amount of extracellular K+ ions may lead to lethal hyperkalemia. Therefore, clinical features of oleander poisoning are similar to digoxin toxicity and include nausea, diarrhea, and vomiting due to stimulation of the area postrema of the medulla oblongata, neuropsychic disorders, and pathological motor manifestations. Cardiotoxic glycosides are also responsible for stimulating the vagus nerve (leading to sinus bradycardia) and the phrenic nerve (leading to hyperventilation), and lethal brady- and tachyarrhythmias, including asystole and ventricular fibrillation. Oleander poisoning can also result in blurred vision, and vision disturbances, including halos appearing around objects. Oleander sap can cause skin irritations, severe eye inflammation and irritation, and allergic reactions characterized by dermatitis.
The severity of the intoxication can vary based on the quantity ingested and an individual's physiological response, as well as the time of symptom onset after oleander ingestion: they can rapidly occur after drinking teas prepared with oleander leaves or roots or develop more slowly due to the ingestion of unprepared plant parts.
Treatment
Poisoning and reactions to oleander plants are evident quickly, requiring immediate medical care in suspected or known poisonings of both humans and animals. Induced vomiting and gastric lavage are protective measures to reduce absorption of the toxic compounds. Activated carbon may also be administered to help absorb any remaining toxins. Further medical attention may be required depending on the severity of the poisoning and symptoms. Temporary cardiac pacing will be required in many cases (usually for a few days) until the toxin is excreted.
Digoxin immune fab is the best way to cure an oleander poisoning if inducing vomiting has no or minimal success, although it is usually used only for life-threatening conditions due to side effects.
Drying of plant materials does not eliminate the toxins. It is also hazardous for animals such as sheep, horses, cattle, and other grazing animals, with as little as 100 g being enough to kill an adult horse. Plant clippings are especially dangerous to horses, as they are sweet. In July 2009, several horses were poisoned in this manner from the leaves of the plant. Symptoms of a poisoned horse include severe diarrhea and abnormal heartbeat. Aśvamāra (अश्वमार) in Sanskrit refers to this plant, meaning Aśva ‘horse’ and Māra ‘killing’. There is a wide range of toxins and secondary compounds within oleander, and care should be taken around this plant due to its toxic nature. Different names for oleander are used around the world in different locations, so, when encountering a plant with this appearance, regardless of the name used for it, one should exercise great care and caution to avoid ingestion of any part of the plant, including its sap and dried leaves or twigs. The dried or fresh branches should not be used for spearing food, for preparing a cooking fire, or as a food skewer. Many of the oleander relatives, such as the desert rose (Adenium obesum) found in East Africa, have similar leaves and flowers and are equally toxic.
Research
Drugs derived from N. oleander have been investigated as a treatment for cancer, but have failed to demonstrate clinical utility. According to the American Cancer Society, the trials conducted so far have produced no evidence of benefit, while they did cause adverse side effects.
Culture
In a research study done by Haralampos V. Harissis, he claims that the laurel the Pythia is commonly depicted with is actually an oleander plant, and the poisonous plant and its subsequent hallucinations are the source of the oracle's mystical power and subsequent prophecies. Many of the symptoms that primary sources such as Plutarch and Democritus report align with results of oleander poisoning. Harissis also provides evidence claiming that the word laurel may have been used to describe an oleander leaf.
Folklore
The toxicity of the plant makes it the center of an urban legend documented on several continents and over more than a century. Often told as a true and local event, typically an entire family, or in other tellings a group of scouts, succumbs after consuming hot dogs or other food roasted over a campfire using oleander sticks. Some variants tell of this happening to Napoleon's or Alexander the Great's soldiers.
There is an ancient account mentioned by Pliny the Elder in his Natural History, who described a region in Pontus in Turkey where the honey was poisoned from bees having pollinated poisonous flowers, with the honey left as a poisonous trap for an invading army. The flowers have sometimes been mis-translated as oleander, but oleander flowers are nectarless and therefore cannot transmit any toxins via nectar. The actual flower referenced by Pliny was either Azalea or Rhododendron, which is still used in Turkey to produce a hallucinogenic honey.
Oleander is the official flower of the city of Hiroshima, having been the first to bloom following the atomic bombing of the city in 1945.
In painting
Oleander was part of subject matter of paintings by famous artists including:
Gustav Klimt, who painted "Two Girls with an Oleander" between 1890 and 1892.
Vincent van Gogh painted his famous "Oleanders" in Arles in 1888. Van Gogh found the flowers "joyous" and "life-affirming" because of their inexhaustible blooms and vigour.
Anglo-Dutch artist Sir Lawrence Alma-Tadema incorporated oleanders into his classically inspired paintings, including "An Oleander" (1882), "Courtship", "Under the Roof of Blue Ionian Weather" and "A Roman Flower Market" (1868).
"The Terrace at Méric (Oleanders)", an 1867 Impressionist painting by Frédéric Bazille.
In literature, film and music
Janet Fitch's 1999 novel White Oleander is centered around a young Southern California girl's experiences growing up in foster care after her mother is imprisoned for poisoning an ex-boyfriend with the plant. The book was adapted into a 2002 film of the same name starring Michelle Pfeiffer and Alison Lohman.
In the 17th century AD Farsi-language book the Jahangirnama, the Mughal emperor Jahangir passes a stream overgrowing with oleanders along its banks. He orders the nobles in his train to adorn their turbans with oleander blossoms, creating a "field of flowers" on their heads.
Steely Dan's 1973 song "My Old School" contains the line "Oleanders growing outside her door, soon they're gonna be in bloom up in Annandale" in the second verse. It has been theorized that this reference is either a metaphor for a harmful relationship, or marijuana, which is the subcontext of the song.
The Yeasayer song "I Am Chemistry" contains the refrain "My momma told me not to fool with oleander, and never handle the deadly quaker buttons again".
Indie rock band Mother Mother has a song called "Oleander" on their 2011 album Eureka.
In video games
Red Dead Redemption 2 features a deadly plant, oleander sage, which may be used to craft poisonous weapons, and is based on nerium oleander.
Schwierige Mitarbeit.
Keine Strömungslimitierung, keine dynamische Überblähung, keine rstriktive Ventilationsstörung.
Grafik 3: Fast normale Leistungsfähigkeit.
Grafik 9: Normoxämie, normale AaDO2. Erhöhtes PETCO2 um 30 mmHg.
Grafik 7: normales Atemmuster.
Grafik 6: hohe Atemäquivalente für O2 (unökonomische Ventilation) und CO2 bis um 50 (relative Hyperventilation bzgl. CO2).
Dem entspricht Grafik 4: hohe Steigung der Kurve VE nach VCO2.
Grafik 2: normaler Anstieg des O2-Pulses.
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
OLYMPUS DIGITAL CAMERA
Great Tit - adult female
Flew into the sunroom and in escaping the attentions of the Broon Dug, concussed itself on the windows.
Having instructed the dog “NO” I was able to pick it up in a towel and keep it calm inside the towel until it started to move a little. It then spent about 10 minutes in my hand, then perched, as the shocked hyperventilation slowly gave way to normal alertness.
After I wielded the macro flash camera in one hand with it now perched on a finger of my other hand, It shat on me three times, and flew off.
Of course all the settings were entirely wrong, but there is a strict limit to what one can adjust with one hand only.
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Thomas is the kitten of a feral cat that decided it owned me. He isn't the hunter that his mother was but he's big and loveable. It's cold tonight and of course, he won't come in. That's because he's his mother's son and has a hyperventilation problem when he comes inside. So, he hangs a fight with a stray cat tonight and I have to go outside to run the other cat off. Thom never wanders but other cats just can't stay away. I'll go back out and call him back up to put him in his bed to stay warm for the night.
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
In the waiting room at the veterinarian's for her annual physical. That open mouth is not a meow - it is hyperventilation. Fortunately, she survived the exam.
Staff Sgt. William Eagleblanket looks through a bag of medical supplies during a Combat Lifesaver course on Patton Barracks in Heidelberg Friday. Soldiers from various installations trained for three days to learn how to properly treat injuries caused on the battlefield, ranging from bleeding to hyperventilation. (Photo by Jonathan Ochart)
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Sii buona sera, sii clemente con le mie paure e il grigio che preme sulle tempie, non chiedermi di lei, di voltarmi indietro e accorgermi di quanto siano incerti i miei passi. Sii conforto per le mie stupide paure e quiete per i miei fragili pensieri, non lasciare che il senso del sangue possa sbocciare come una rosa dalla mia bocca. Sii buona sera, e accoglimi tra le tue molle vesti in un sonno a cui abbiano strappato i sogni.
The Out Crowd
Be Good
2012. The Manteca Camera Club did a workshop on photographing bubbles. We only had one person blowing at a time (hyperventilation, by the way, sets in faster than you'd expect) so there are only a couple bubbles per frame. I composited a number of images from the same set and added a bi-colored gradient to break up the uniformity of color.
It's a very simple to set up you can try at home. We just put diffusion paper in front of a couple of hardware store clamp lights on a light stand on either side of the bubble blowing area and turned off most of the room lights. Although, it works best if the work lights are the only light source.
Nerium oleander most commonly known as oleander or nerium, is a shrub or small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium, belonging to subfamily Apocynoideae of the dogbane family Apocynaceae. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.
Nerium grows to 2–6 metres (7–20 feet) tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.
Nerium contains several toxic compounds, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.
Description
Oleander grows to 2–6 metres (7–20 feet) tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom, while mature stems have a grayish bark. The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, 5–21 centimetres (2–8 inches) long and 1–3.5 cm (3⁄8–1+3⁄8 in) broad, and with an entire margin filled with minute reticulate venation web typical of eudicots. The leaves are light green and very glossy when young, maturing to a dull dark green.
The flowers grow in clusters at the end of each branch; they are white, pink to red, 2.5–5 cm (1–2 in) diameter, with a deeply 5-lobed fringed corolla round the central corolla tube. They are often, but not always, sweet-scented. The fruit is a long narrow pair of follicles 5–23 cm (2–9 in) long, which splits open at maturity to release numerous downy seeds.
Taxonomy
Nerium oleander is the only species currently classified in the genus Nerium. It belongs to (and gives its name to) the small tribe Nerieae of subfamily Apocynoideae of the dogbane family Apocynaceae. The genera most closely related thus include the equally ornamental (and equally toxic) Adenium G.Don and Strophanthus DC. - both of which contain (like oleander) potent cardiac glycosides that have led to their use as arrow poisons in Africa. The three remaining genera Alafia Thouars, Farquharia Stapf and Isonema R.Br. are less well-known in cultivation.
Synonymy
The plant has been described under a wide variety of names that are today considered its synonyms:
Oleander Medik.
Nerion Tourn. ex St.-Lag.
Nerion oleandrum St.-Lag.
Nerium carneum Dum.Cours.
Nerium flavescens Spin
Nerium floridum Salisb.
Nerium grandiflorum Desf.
Nerium indicum Mill.
Nerium japonicum Gentil
Nerium kotschyi Boiss.
Nerium latifolium Mill.
Nerium lauriforme Lam.
Nerium luteum Nois. ex Steud.
Nerium madonii M.Vincent
Nerium mascatense A.DC.
Nerium odoratissimum Wender.
Nerium odoratum Lam.
Nerium odorum Aiton
Nerium splendens Paxton
Nerium thyrsiflorum Paxton
Nerium verecundum Salisb.
Oleander indica (Mill.) Medik.
Oleander vulgaris Medik.
Etymology
The taxonomic name Nerium oleander was first assigned by Linnaeus in 1753. The genus name Nerium is the Latinized form of the Ancient Greek name for the plant nẽrion (νήριον), which is in turn derived from the Greek for water, nẽros (νηρός), because of the natural habitat of the oleander along rivers and streams.
The origins of the species name are disputed. The word oleander appears as far back as the first century AD, when the Greek physician Pedanius Dioscorides cited it as one of the terms used by the Romans for the plant. Merriam-Webster believes the word is a Medieval Latin corruption of Late Latin names for the plant: arodandrum or lorandrum, or more plausibly rhododendron (another Ancient Greek name for the plant), with the addition of olea because of the superficial resemblance to the olive tree (Olea europea) Another theory posited is that oleander is the Latinized form of a Greek compound noun: οllyo (ὀλλύω) 'I kill', and the Greek noun for man, aner, genitive andros (ἀνήρ, ἀνδρός). ascribed to oleander's toxicity to humans.
The etymological association of oleander with the bay laurel has continued into the modern day: in France the plant is known as "laurier rose", while the Spanish term, "Adelfa", is the descendant of the original Ancient Greek name for both the bay laurel and the oleander, daphne, which subsequently passed into Arabic usage and thence to Spain.
The ancient city of Volubilis in Morocco may have taken its name from the Berber name alili or oualilt for the flower.
Distribution and habitat
Nerium oleander is either native or naturalized to a broad area spanning from Northwest Africa and Iberian and Italian Peninsula eastward through the Mediterranean region and warmer areas of the Black Sea region, Arabian Peninsula, southern Asia, and as far east as Yunnan in southern parts of China. It typically occurs around stream beds in river valleys, where it can alternatively tolerate long seasons of drought and inundation from winter rains. N. oleander is planted in many subtropical and tropical areas of the world.
On the East Coast of the US, it grows as far north as Virginia Beach, while in California and Texas miles of oleander shrubs are planted on median strips. There are estimated to be 25 million oleanders planted along highways and roadsides throughout the state of California. Because of its durability, oleander was planted prolifically on Galveston Island in Texas after the disastrous Hurricane of 1900. They are so prolific that Galveston is known as the 'Oleander City'; an annual oleander festival is hosted every spring. Moody Gardens in Galveston hosts the propagation program for the International Oleander Society, which promotes the cultivation of oleanders. New varieties are hybridized and grown on the Moody Gardens grounds, encompassing every named variety.
Beyond the traditional Mediterranean and subtropical range of oleander, the plant can also be cultivated in mild oceanic climates with the appropriate precautions. It is grown without protection in warmer areas in Switzerland, southern and western Germany and southern England and can reach great sizes in London and to a lesser extent in Paris due to the urban heat island effect. This is also the case with North American cities in the Pacific Northwest like Portland, Seattle, and Vancouver. Plants may suffer damage or die back in such marginal climates during severe winter cold but will rebound from the roots.
Ecology
Some invertebrates are known to be unaffected by oleander toxins, and feed on the plants. Caterpillars of the polka-dot wasp moth (Syntomeida epilais) feed specifically on oleanders and survive by eating only the pulp surrounding the leaf-veins, avoiding the fibers. Larvae of the common crow butterfly (Euploea core) and oleander hawk-moth (Daphnis nerii) also feed on oleanders, and they retain or modify toxins, making them unpalatable to potential predators such as birds, but not to other invertebrates such as spiders and wasps.
The flowers require insect visits to set seed, and seem to be pollinated through a deception mechanism. The showy corolla acts as a potent advertisement to attract pollinators from a distance, but the flowers are nectarless and offer no reward to their visitors. They therefore receive very few visits, as typical of many rewardless flower species. Fears of honey contamination with toxic oleander nectar are therefore unsubstantiated.
Leaf scorch
A bacterial disease known as oleander leaf scorch (Xylella fastidiosa subspecies sandyi) has become a serious threat to the shrub since it was first noticed in Palm Springs, California, in 1992. The disease has since devastated hundreds of thousands of shrubs mainly in Southern California, but also on a smaller scale in Arizona, Nevada and Texas. The culprit is a bacterium which is spread via insects (the glassy-winged sharpshooter primarily) which feed on the tissue of oleanders and spread the bacteria. This inhibits the circulation of water in the tissue of the plant, causing individual branches to die until the entire plant is consumed.
Symptoms of leaf scorch infection may be slow to manifest themselves, but it becomes evident when parts of otherwise healthy oleanders begin to yellow and wither, as if scorched by heat or fire. Die-back may cease during winter dormancy, but the disease flares up in summer heat while the shrub is actively growing, which allows the bacteria to spread through the xylem of the plant. As such it can be difficult to identify at first because gardeners may mistake the symptoms for those of drought stress or nutrient deficiency.
Pruning out affected parts can slow the progression of the disease but not eliminate it. This malaise can continue for several years until the plant completely dies—there is no known cure. The best method for preventing further spread of the disease is to prune infected oleanders to the ground immediately after the infection is noticed.
The responsible pathogen was identified as the subspecies sandyi by Purcell et al., 1999.
Cultivation
Nerium oleander has a history of cultivation going back millennia, especially amongst the great ancient civilizations of the Mediterranean Basin. Some scholars believe it to be the rhodon (rose), also called the 'Rose of Jericho', mentioned in apocryphal writings (Ecclesiasticus XXIV, 13) dating back to between 450 and 180 BC.
The ancient Greeks had several names for the plant, including rhododaphne, nerion, rhododendron and rhodon. Pliny confirmed that the Romans had no Latin word for the plant, but used the Greek terms instead. Pedanius Dioscorides states in his 1st century AD pharmacopeia De Materia Medica that the Romans used the Greek rhododendron but also the Latin Oleander and Laurorosa. The Egyptians apparently called it scinphe, the North Africans rhodedaphane, and the Lucanians (a southern Italic people) icmane.
Both Pliny and Dioscorides stated that oleander was an effective antidote to venomous snake bites if mixed with rue and drunk. However, both rue and oleander are poisonous themselves, and consuming them after a venomous snake bite can accelerate the rate of mortality and increase fatalities.
A 2014 article in the medical journal Perspectives in Biology and Medicine posited that oleander was the substance used to induce hallucinations in the Pythia, the female priestess of Apollo, also known as the Oracle of Delphi in Ancient Greece. According to this theory, the symptoms of the Pythia's trances (enthusiasmos) correspond to either inhaling the smoke of or chewing small amounts of oleander leaves, often called by the generic term laurel in Ancient Greece, which led to confusion with the bay laurel that ancient authors cite.
In his book Enquiries into Plants of circa 300 BC, Theophrastus described (among plants that affect the mind) a shrub he called onotheras, which modern editors render oleander: "the root of onotheras [oleander] administered in wine", he alleges, "makes the temper gentler and more cheerful".
The root of onotheras [oleander] administered in wine makes the temper gentler and more cheerful. The plant has a leaf like that of the almond, but smaller, and the flower is red like a rose. The plant itself (which loves hilly country) forms a large bush; the root is red and large, and, if this is dried, it gives off a fragrance like wine.
In another mention, of "wild bay" (Daphne agria), Theophrastus appears to intend the same shrub.
Oleander was a very popular ornamental shrub in Roman peristyle gardens; it is one of the flora most frequently depicted on murals in Pompeii and elsewhere in Italy. These murals include the famous garden scene from the House of Livia at Prima Porta outside Rome, and those from the House of the Wedding of Alexander and the Marine Venus in Pompeii.
Carbonized fragments of oleander wood have been identified at the Villa Poppaea in Oplontis, likewise buried by the eruption of Mount Vesuvius in 79 AD. They were found to have been planted in a decorative arrangement with citron trees (Citrus medica) alongside the villa's swimming pool.
Herbaria of oleander varieties are compiled and held at the Smithsonian Institution in Washington, D.C., and at Moody Gardens in Galveston, Texas.
Ornamental gardening
Oleander is a vigorous grower in warm subtropical regions, where it is extensively used as an ornamental plant in parks, along roadsides and in private gardens. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. Hardy versions like white, red and pink oleander will tolerate occasional light frost down to −10 °C (14 °F), though the leaves may be damaged. The toxicity of oleander renders it deer-resistant and its large size makes for a good windbreak – as such it is frequently planted as a hedge along property lines and in agricultural settings.
The plant is tolerant of poor soils, intense heat, salt spray, and sustained drought – although it will flower and grow more vigorously with regular water. Although it does not require pruning to thrive and bloom, oleander can become unruly with age and older branches tend to become gangly, with new growth emerging from the base. For this reason gardeners are advised to prune mature shrubs in the autumn to shape and induce lush new growth and flowering for the following spring. Unless they wish to harvest the seeds, many gardeners choose to prune away the seedpods that form on spent flower clusters, which are a drain on energy. Propagation can be made from cuttings, where they can readily root after being placed in water or in rich organic potting material, like compost.
In Mediterranean climates oleanders can be expected to bloom from April through October, with the heaviest bloom usually occurring between May and June. Free-flowering varieties like 'Petite Salmon' or 'Mont Blanc' require no period of rest and can flower continuously throughout the year if the weather remains warm.
In cold winter climates, oleander is a popular summer potted plant readily available at most nurseries. They require frequent heavy watering and fertilizing as compared to being planted in the ground, but oleander is nonetheless an ideal flowering shrub for patios and other spaces with hot sunshine. During the winter they should be moved indoors, ideally into an unheated greenhouse or basement where they can be allowed to go dormant. Once they are dormant they require little light and only occasional watering. Placing them in a space with central heating and poor air flow can make them susceptible to a variety of pests – aphids, mealybugs, oleander scale, whitefly and spider mites.
Colors and varieties
Oleander flowers are showy, profuse, and often fragrant, which makes them very attractive in many contexts. Over 400 cultivars have been named, with several additional flower colors not found in wild plants having been selected, including yellow, peach and salmon. Many cultivars, like 'Hawaii' or 'Turner's Carnival', are multi-colored, with brilliant striped corollas. The solid whites, reds and a variety of pinks are the most common. Double flowered cultivars like 'Mrs. Isadore Dyer' (deep pink), 'Mathilde Ferrier' (yellow) or 'Mont Blanc' (white) are enjoyed for their large, rose-like blooms and strong fragrance. There is also a variegated form, 'Variegata', featuring leaves striped in yellow and white. Several dwarf cultivars have also been developed, offering a more compact form and size for small spaces. These include 'Little Red', 'Petite White', 'Petite Pink' and 'Petite Salmon', which grow to about 8 feet (2.4 m) at maturity.
Toxicity
Oleander has historically been considered a poisonous plant because of toxic compounds it contains, especially when consumed in large amounts. Among these compounds are oleandrin and oleandrigenin, known as cardiac glycosides, which are known to have a narrow therapeutic index and are toxic when ingested.
Toxicity studies of animals concluded that birds and rodents were observed to be relatively insensitive to the administered oleander cardiac glycosides. Other mammals, however, such as dogs and humans, are relatively sensitive to the effects of cardiac glycosides and the clinical manifestations of "glycoside intoxication".
In reviewing oleander toxicity cases seen in-hospital, Lanford and Boor concluded that, except for children who might be at greater risk, "the human mortality associated with oleander ingestion is generally very low, even in cases of moderate intentional consumption (suicide attempts)." In 2000, a rare instance of death from oleander poisoning occurred when two toddlers adopted from an orphanage ate the leaves from a neighbor's shrub in El Segundo, California. Because oleander is extremely bitter, officials speculated that the toddlers had developed a condition caused by malnutrition, pica, which causes people to eat otherwise inedible material.
Effects of poisoning
Ingestion of this plant can affect the gastrointestinal system, the heart, and the central nervous system. The main effect of cardiotoxic glycosides is positive inotropy. Glycosides bind to the sarcolemma transmembrane ATPase of cardiac muscle cells and compete with K+ ions, inactivating the enzyme. This results in an accumulation of Na+ and Ca2+ ions into the cardiac muscle cells, leading to stronger and faster heart contractions. Moreover, the increased amount of extracellular K+ ions may lead to lethal hyperkalemia. Therefore, clinical features of oleander poisoning are similar to digoxin toxicity and include nausea, diarrhea, and vomiting due to stimulation of the area postrema of the medulla oblongata, neuropsychic disorders, and pathological motor manifestations. Cardiotoxic glycosides are also responsible for stimulating the vagus nerve (leading to sinus bradycardia) and the phrenic nerve (leading to hyperventilation), and lethal brady- and tachyarrhythmias, including asystole and ventricular fibrillation. Oleander poisoning can also result in blurred vision, and vision disturbances, including halos appearing around objects. Oleander sap can cause skin irritations, severe eye inflammation and irritation, and allergic reactions characterized by dermatitis.
The severity of the intoxication can vary based on the quantity ingested and an individual's physiological response, as well as the time of symptom onset after oleander ingestion: they can rapidly occur after drinking teas prepared with oleander leaves or roots or develop more slowly due to the ingestion of unprepared plant parts.
Treatment
Poisoning and reactions to oleander plants are evident quickly, requiring immediate medical care in suspected or known poisonings of both humans and animals. Induced vomiting and gastric lavage are protective measures to reduce absorption of the toxic compounds. Activated carbon may also be administered to help absorb any remaining toxins. Further medical attention may be required depending on the severity of the poisoning and symptoms. Temporary cardiac pacing will be required in many cases (usually for a few days) until the toxin is excreted.
Digoxin immune fab is the best way to cure an oleander poisoning if inducing vomiting has no or minimal success, although it is usually used only for life-threatening conditions due to side effects.
Drying of plant materials does not eliminate the toxins. It is also hazardous for animals such as sheep, horses, cattle, and other grazing animals, with as little as 100 g being enough to kill an adult horse. Plant clippings are especially dangerous to horses, as they are sweet. In July 2009, several horses were poisoned in this manner from the leaves of the plant. Symptoms of a poisoned horse include severe diarrhea and abnormal heartbeat. Aśvamāra (अश्वमार) in Sanskrit refers to this plant, meaning Aśva ‘horse’ and Māra ‘killing’. There is a wide range of toxins and secondary compounds within oleander, and care should be taken around this plant due to its toxic nature. Different names for oleander are used around the world in different locations, so, when encountering a plant with this appearance, regardless of the name used for it, one should exercise great care and caution to avoid ingestion of any part of the plant, including its sap and dried leaves or twigs. The dried or fresh branches should not be used for spearing food, for preparing a cooking fire, or as a food skewer. Many of the oleander relatives, such as the desert rose (Adenium obesum) found in East Africa, have similar leaves and flowers and are equally toxic.
Research
Drugs derived from N. oleander have been investigated as a treatment for cancer, but have failed to demonstrate clinical utility. According to the American Cancer Society, the trials conducted so far have produced no evidence of benefit, while they did cause adverse side effects.
Culture
In a research study done by Haralampos V. Harissis, he claims that the laurel the Pythia is commonly depicted with is actually an oleander plant, and the poisonous plant and its subsequent hallucinations are the source of the oracle's mystical power and subsequent prophecies. Many of the symptoms that primary sources such as Plutarch and Democritus report align with results of oleander poisoning. Harissis also provides evidence claiming that the word laurel may have been used to describe an oleander leaf.
Folklore
The toxicity of the plant makes it the center of an urban legend documented on several continents and over more than a century. Often told as a true and local event, typically an entire family, or in other tellings a group of scouts, succumbs after consuming hot dogs or other food roasted over a campfire using oleander sticks. Some variants tell of this happening to Napoleon's or Alexander the Great's soldiers.
There is an ancient account mentioned by Pliny the Elder in his Natural History, who described a region in Pontus in Turkey where the honey was poisoned from bees having pollinated poisonous flowers, with the honey left as a poisonous trap for an invading army. The flowers have sometimes been mis-translated as oleander, but oleander flowers are nectarless and therefore cannot transmit any toxins via nectar. The actual flower referenced by Pliny was either Azalea or Rhododendron, which is still used in Turkey to produce a hallucinogenic honey.
Oleander is the official flower of the city of Hiroshima, having been the first to bloom following the atomic bombing of the city in 1945.
In painting
Oleander was part of subject matter of paintings by famous artists including:
Gustav Klimt, who painted "Two Girls with an Oleander" between 1890 and 1892.
Vincent van Gogh painted his famous "Oleanders" in Arles in 1888. Van Gogh found the flowers "joyous" and "life-affirming" because of their inexhaustible blooms and vigour.
Anglo-Dutch artist Sir Lawrence Alma-Tadema incorporated oleanders into his classically inspired paintings, including "An Oleander" (1882), "Courtship", "Under the Roof of Blue Ionian Weather" and "A Roman Flower Market" (1868).
"The Terrace at Méric (Oleanders)", an 1867 Impressionist painting by Frédéric Bazille.
In literature, film and music
Janet Fitch's 1999 novel White Oleander is centered around a young Southern California girl's experiences growing up in foster care after her mother is imprisoned for poisoning an ex-boyfriend with the plant. The book was adapted into a 2002 film of the same name starring Michelle Pfeiffer and Alison Lohman.
In the 17th century AD Farsi-language book the Jahangirnama, the Mughal emperor Jahangir passes a stream overgrowing with oleanders along its banks. He orders the nobles in his train to adorn their turbans with oleander blossoms, creating a "field of flowers" on their heads.
Steely Dan's 1973 song "My Old School" contains the line "Oleanders growing outside her door, soon they're gonna be in bloom up in Annandale" in the second verse. It has been theorized that this reference is either a metaphor for a harmful relationship, or marijuana, which is the subcontext of the song.
The Yeasayer song "I Am Chemistry" contains the refrain "My momma told me not to fool with oleander, and never handle the deadly quaker buttons again".
Indie rock band Mother Mother has a song called "Oleander" on their 2011 album Eureka.
In video games
Red Dead Redemption 2 features a deadly plant, oleander sage, which may be used to craft poisonous weapons, and is based on nerium oleander.
mon manège à moi... par hyperventilation (-;
- Toupie de Cuong Nguyen Hung (La touche vietnamienne, Ed. NuiNui)
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
I found myself in front of a row of vendors and this girl stood out to me in the brightest red jacket I think I've ever seen. She was sobbing, and screaming into the phone in a piercing American accent "Where are you?? Come meet me by the front of Oktoberfest! WHERE ARE YOU?" but it was far too loud to hear anyone on a phone, let alone get enough service to maintain the conversation. I found myself just standing there staring at her. "Well," I thought, "do I really have anything to loose?"
She hung up her phone and looked so absolutely distraught, which kind of reflected how I was beginning to feel after an hour of wandering this madhouse. "Lost all your friends too?" I asked. She could barely manage to nod her head. "Well, wanna go get something to eat? Im starving" and I gave her my arm. Through hyperventilations she took it and tried to smile, and we started to exchange small talk. Thank fucking god.
Oktoberfest, Munich, Germany.
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
I plan to upload a handful of carnation pics, from varying perspectives, lighting and backdrops. I feel compelled to remind everyone, that carnations are toxic to cats as well as dogs, so as a precaution, I locked this carnation bouquet up in a secure broom closet immediately following the photoshooting session. I must have taken a hundred shots. It would likely be boring for Flickr members to check out that many, so I'm uploading around six or seven of the ones I believe are the most interesting. And another thing, before I forget, cats and dogs do not have to ingest the carnation petals, leaves or stems to become sick; the toxic chemical residue can cause illness from being deposited on the animal's fur and skin. And last but not least, don't go hyperventilatingly hysterical if Fluffy or Rover eat some carnations. Not typically fatal, although your pet will usually get darned good and sick. On the otherhand, if your cat or dog eats your Easter lily, hyperventilate and panic. That plant, the lily family of flowers will kill your cat or dog. Seek veterinarian treatment immediately. Actually, I'm being totally facetious, when I imply that hyperventilating is the way to go with lily poisoning. Hyperventilation is a serious medical anxiety syndrome. It causes carbon dioxide levels to drop in your blood stream. There is also excess oxygen. Your vessels constrict with your nerves firing incorrectly. Your concentration and judgment can be adversely affected. Last thing you need in a medical emergency situation. If you're prone to this, seek medical help, anti-anxiety drugs or whatever. Sometimes breathing into a paper bag can help in some cases. Also a respiratory therapist might be helpful in many cases.
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
I am really out of shape. In marching band today, some other guys in the drumline were laughing as we were running a set and the director got really mad and made the entire drumline, myself included, run laps until he said stop. During my first lap, I developed KILLER chest pain. I couldn't breathe right and I freaked out and didn't know what to do, so I cried. A fellow drumliner told me to go sit on the side. Then a chick from color gaurd came running over and magically pulled two ice packs out of her butt to put on my chest and the back of my neck. Then, a mom who just happens to be a nurse ran over and tucked my face into my shirt and made me breathe in my own air. She checked my pulse and asked me questions. She explained that what I was going through was lack of carbon dioxide which leads to chest pain, dizziness, and tinglies in your arms and hands. Minutes later, the color came back to my face and I was all better.
Rebirthing. Aus der Serie Holotropes Atmen. Animated Gif. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Rebirthing. Aus der Serie Holotropes Atmen. 2014
Rotierende Skulpturen aus Glas Kopf, Maler Krepp Klebeband, Laserpointer und Projektion "Pathfinder 1994 - 2014"
Skulptur, Objekt, Video, Installation, Fotografie
Markus Wintersberger 2014
Nerium oleander most commonly known as oleander or nerium, is a shrub or small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium, belonging to subfamily Apocynoideae of the dogbane family Apocynaceae. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.
Nerium grows to 2–6 metres (7–20 feet) tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.
Nerium contains several toxic compounds, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.
Description
Oleander grows to 2–6 metres (7–20 feet) tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom, while mature stems have a grayish bark. The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, 5–21 centimetres (2–8 inches) long and 1–3.5 cm (3⁄8–1+3⁄8 in) broad, and with an entire margin filled with minute reticulate venation web typical of eudicots. The leaves are light green and very glossy when young, maturing to a dull dark green.
The flowers grow in clusters at the end of each branch; they are white, pink to red, 2.5–5 cm (1–2 in) diameter, with a deeply 5-lobed fringed corolla round the central corolla tube. They are often, but not always, sweet-scented. The fruit is a long narrow pair of follicles 5–23 cm (2–9 in) long, which splits open at maturity to release numerous downy seeds.
Taxonomy
Nerium oleander is the only species currently classified in the genus Nerium. It belongs to (and gives its name to) the small tribe Nerieae of subfamily Apocynoideae of the dogbane family Apocynaceae. The genera most closely related thus include the equally ornamental (and equally toxic) Adenium G.Don and Strophanthus DC. - both of which contain (like oleander) potent cardiac glycosides that have led to their use as arrow poisons in Africa. The three remaining genera Alafia Thouars, Farquharia Stapf and Isonema R.Br. are less well-known in cultivation.
Synonymy
The plant has been described under a wide variety of names that are today considered its synonyms:
Oleander Medik.
Nerion Tourn. ex St.-Lag.
Nerion oleandrum St.-Lag.
Nerium carneum Dum.Cours.
Nerium flavescens Spin
Nerium floridum Salisb.
Nerium grandiflorum Desf.
Nerium indicum Mill.
Nerium japonicum Gentil
Nerium kotschyi Boiss.
Nerium latifolium Mill.
Nerium lauriforme Lam.
Nerium luteum Nois. ex Steud.
Nerium madonii M.Vincent
Nerium mascatense A.DC.
Nerium odoratissimum Wender.
Nerium odoratum Lam.
Nerium odorum Aiton
Nerium splendens Paxton
Nerium thyrsiflorum Paxton
Nerium verecundum Salisb.
Oleander indica (Mill.) Medik.
Oleander vulgaris Medik.
Etymology
The taxonomic name Nerium oleander was first assigned by Linnaeus in 1753. The genus name Nerium is the Latinized form of the Ancient Greek name for the plant nẽrion (νήριον), which is in turn derived from the Greek for water, nẽros (νηρός), because of the natural habitat of the oleander along rivers and streams.
The origins of the species name are disputed. The word oleander appears as far back as the first century AD, when the Greek physician Pedanius Dioscorides cited it as one of the terms used by the Romans for the plant. Merriam-Webster believes the word is a Medieval Latin corruption of Late Latin names for the plant: arodandrum or lorandrum, or more plausibly rhododendron (another Ancient Greek name for the plant), with the addition of olea because of the superficial resemblance to the olive tree (Olea europea) Another theory posited is that oleander is the Latinized form of a Greek compound noun: οllyo (ὀλλύω) 'I kill', and the Greek noun for man, aner, genitive andros (ἀνήρ, ἀνδρός). ascribed to oleander's toxicity to humans.
The etymological association of oleander with the bay laurel has continued into the modern day: in France the plant is known as "laurier rose", while the Spanish term, "Adelfa", is the descendant of the original Ancient Greek name for both the bay laurel and the oleander, daphne, which subsequently passed into Arabic usage and thence to Spain.
The ancient city of Volubilis in Morocco may have taken its name from the Berber name alili or oualilt for the flower.
Distribution and habitat
Nerium oleander is either native or naturalized to a broad area spanning from Northwest Africa and Iberian and Italian Peninsula eastward through the Mediterranean region and warmer areas of the Black Sea region, Arabian Peninsula, southern Asia, and as far east as Yunnan in southern parts of China. It typically occurs around stream beds in river valleys, where it can alternatively tolerate long seasons of drought and inundation from winter rains. N. oleander is planted in many subtropical and tropical areas of the world.
On the East Coast of the US, it grows as far north as Virginia Beach, while in California and Texas miles of oleander shrubs are planted on median strips. There are estimated to be 25 million oleanders planted along highways and roadsides throughout the state of California. Because of its durability, oleander was planted prolifically on Galveston Island in Texas after the disastrous Hurricane of 1900. They are so prolific that Galveston is known as the 'Oleander City'; an annual oleander festival is hosted every spring. Moody Gardens in Galveston hosts the propagation program for the International Oleander Society, which promotes the cultivation of oleanders. New varieties are hybridized and grown on the Moody Gardens grounds, encompassing every named variety.
Beyond the traditional Mediterranean and subtropical range of oleander, the plant can also be cultivated in mild oceanic climates with the appropriate precautions. It is grown without protection in warmer areas in Switzerland, southern and western Germany and southern England and can reach great sizes in London and to a lesser extent in Paris due to the urban heat island effect. This is also the case with North American cities in the Pacific Northwest like Portland, Seattle, and Vancouver. Plants may suffer damage or die back in such marginal climates during severe winter cold but will rebound from the roots.
Ecology
Some invertebrates are known to be unaffected by oleander toxins, and feed on the plants. Caterpillars of the polka-dot wasp moth (Syntomeida epilais) feed specifically on oleanders and survive by eating only the pulp surrounding the leaf-veins, avoiding the fibers. Larvae of the common crow butterfly (Euploea core) and oleander hawk-moth (Daphnis nerii) also feed on oleanders, and they retain or modify toxins, making them unpalatable to potential predators such as birds, but not to other invertebrates such as spiders and wasps.
The flowers require insect visits to set seed, and seem to be pollinated through a deception mechanism. The showy corolla acts as a potent advertisement to attract pollinators from a distance, but the flowers are nectarless and offer no reward to their visitors. They therefore receive very few visits, as typical of many rewardless flower species. Fears of honey contamination with toxic oleander nectar are therefore unsubstantiated.
Leaf scorch
A bacterial disease known as oleander leaf scorch (Xylella fastidiosa subspecies sandyi) has become a serious threat to the shrub since it was first noticed in Palm Springs, California, in 1992. The disease has since devastated hundreds of thousands of shrubs mainly in Southern California, but also on a smaller scale in Arizona, Nevada and Texas. The culprit is a bacterium which is spread via insects (the glassy-winged sharpshooter primarily) which feed on the tissue of oleanders and spread the bacteria. This inhibits the circulation of water in the tissue of the plant, causing individual branches to die until the entire plant is consumed.
Symptoms of leaf scorch infection may be slow to manifest themselves, but it becomes evident when parts of otherwise healthy oleanders begin to yellow and wither, as if scorched by heat or fire. Die-back may cease during winter dormancy, but the disease flares up in summer heat while the shrub is actively growing, which allows the bacteria to spread through the xylem of the plant. As such it can be difficult to identify at first because gardeners may mistake the symptoms for those of drought stress or nutrient deficiency.
Pruning out affected parts can slow the progression of the disease but not eliminate it. This malaise can continue for several years until the plant completely dies—there is no known cure. The best method for preventing further spread of the disease is to prune infected oleanders to the ground immediately after the infection is noticed.
The responsible pathogen was identified as the subspecies sandyi by Purcell et al., 1999.
Cultivation
Nerium oleander has a history of cultivation going back millennia, especially amongst the great ancient civilizations of the Mediterranean Basin. Some scholars believe it to be the rhodon (rose), also called the 'Rose of Jericho', mentioned in apocryphal writings (Ecclesiasticus XXIV, 13) dating back to between 450 and 180 BC.
The ancient Greeks had several names for the plant, including rhododaphne, nerion, rhododendron and rhodon. Pliny confirmed that the Romans had no Latin word for the plant, but used the Greek terms instead. Pedanius Dioscorides states in his 1st century AD pharmacopeia De Materia Medica that the Romans used the Greek rhododendron but also the Latin Oleander and Laurorosa. The Egyptians apparently called it scinphe, the North Africans rhodedaphane, and the Lucanians (a southern Italic people) icmane.
Both Pliny and Dioscorides stated that oleander was an effective antidote to venomous snake bites if mixed with rue and drunk. However, both rue and oleander are poisonous themselves, and consuming them after a venomous snake bite can accelerate the rate of mortality and increase fatalities.
A 2014 article in the medical journal Perspectives in Biology and Medicine posited that oleander was the substance used to induce hallucinations in the Pythia, the female priestess of Apollo, also known as the Oracle of Delphi in Ancient Greece. According to this theory, the symptoms of the Pythia's trances (enthusiasmos) correspond to either inhaling the smoke of or chewing small amounts of oleander leaves, often called by the generic term laurel in Ancient Greece, which led to confusion with the bay laurel that ancient authors cite.
In his book Enquiries into Plants of circa 300 BC, Theophrastus described (among plants that affect the mind) a shrub he called onotheras, which modern editors render oleander: "the root of onotheras [oleander] administered in wine", he alleges, "makes the temper gentler and more cheerful".
The root of onotheras [oleander] administered in wine makes the temper gentler and more cheerful. The plant has a leaf like that of the almond, but smaller, and the flower is red like a rose. The plant itself (which loves hilly country) forms a large bush; the root is red and large, and, if this is dried, it gives off a fragrance like wine.
In another mention, of "wild bay" (Daphne agria), Theophrastus appears to intend the same shrub.
Oleander was a very popular ornamental shrub in Roman peristyle gardens; it is one of the flora most frequently depicted on murals in Pompeii and elsewhere in Italy. These murals include the famous garden scene from the House of Livia at Prima Porta outside Rome, and those from the House of the Wedding of Alexander and the Marine Venus in Pompeii.
Carbonized fragments of oleander wood have been identified at the Villa Poppaea in Oplontis, likewise buried by the eruption of Mount Vesuvius in 79 AD. They were found to have been planted in a decorative arrangement with citron trees (Citrus medica) alongside the villa's swimming pool.
Herbaria of oleander varieties are compiled and held at the Smithsonian Institution in Washington, D.C., and at Moody Gardens in Galveston, Texas.
Ornamental gardening
Oleander is a vigorous grower in warm subtropical regions, where it is extensively used as an ornamental plant in parks, along roadsides and in private gardens. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. Hardy versions like white, red and pink oleander will tolerate occasional light frost down to −10 °C (14 °F), though the leaves may be damaged. The toxicity of oleander renders it deer-resistant and its large size makes for a good windbreak – as such it is frequently planted as a hedge along property lines and in agricultural settings.
The plant is tolerant of poor soils, intense heat, salt spray, and sustained drought – although it will flower and grow more vigorously with regular water. Although it does not require pruning to thrive and bloom, oleander can become unruly with age and older branches tend to become gangly, with new growth emerging from the base. For this reason gardeners are advised to prune mature shrubs in the autumn to shape and induce lush new growth and flowering for the following spring. Unless they wish to harvest the seeds, many gardeners choose to prune away the seedpods that form on spent flower clusters, which are a drain on energy. Propagation can be made from cuttings, where they can readily root after being placed in water or in rich organic potting material, like compost.
In Mediterranean climates oleanders can be expected to bloom from April through October, with the heaviest bloom usually occurring between May and June. Free-flowering varieties like 'Petite Salmon' or 'Mont Blanc' require no period of rest and can flower continuously throughout the year if the weather remains warm.
In cold winter climates, oleander is a popular summer potted plant readily available at most nurseries. They require frequent heavy watering and fertilizing as compared to being planted in the ground, but oleander is nonetheless an ideal flowering shrub for patios and other spaces with hot sunshine. During the winter they should be moved indoors, ideally into an unheated greenhouse or basement where they can be allowed to go dormant. Once they are dormant they require little light and only occasional watering. Placing them in a space with central heating and poor air flow can make them susceptible to a variety of pests – aphids, mealybugs, oleander scale, whitefly and spider mites.
Colors and varieties
Oleander flowers are showy, profuse, and often fragrant, which makes them very attractive in many contexts. Over 400 cultivars have been named, with several additional flower colors not found in wild plants having been selected, including yellow, peach and salmon. Many cultivars, like 'Hawaii' or 'Turner's Carnival', are multi-colored, with brilliant striped corollas. The solid whites, reds and a variety of pinks are the most common. Double flowered cultivars like 'Mrs. Isadore Dyer' (deep pink), 'Mathilde Ferrier' (yellow) or 'Mont Blanc' (white) are enjoyed for their large, rose-like blooms and strong fragrance. There is also a variegated form, 'Variegata', featuring leaves striped in yellow and white. Several dwarf cultivars have also been developed, offering a more compact form and size for small spaces. These include 'Little Red', 'Petite White', 'Petite Pink' and 'Petite Salmon', which grow to about 8 feet (2.4 m) at maturity.
Toxicity
Oleander has historically been considered a poisonous plant because of toxic compounds it contains, especially when consumed in large amounts. Among these compounds are oleandrin and oleandrigenin, known as cardiac glycosides, which are known to have a narrow therapeutic index and are toxic when ingested.
Toxicity studies of animals concluded that birds and rodents were observed to be relatively insensitive to the administered oleander cardiac glycosides. Other mammals, however, such as dogs and humans, are relatively sensitive to the effects of cardiac glycosides and the clinical manifestations of "glycoside intoxication".
In reviewing oleander toxicity cases seen in-hospital, Lanford and Boor concluded that, except for children who might be at greater risk, "the human mortality associated with oleander ingestion is generally very low, even in cases of moderate intentional consumption (suicide attempts)." In 2000, a rare instance of death from oleander poisoning occurred when two toddlers adopted from an orphanage ate the leaves from a neighbor's shrub in El Segundo, California. Because oleander is extremely bitter, officials speculated that the toddlers had developed a condition caused by malnutrition, pica, which causes people to eat otherwise inedible material.
Effects of poisoning
Ingestion of this plant can affect the gastrointestinal system, the heart, and the central nervous system. The main effect of cardiotoxic glycosides is positive inotropy. Glycosides bind to the sarcolemma transmembrane ATPase of cardiac muscle cells and compete with K+ ions, inactivating the enzyme. This results in an accumulation of Na+ and Ca2+ ions into the cardiac muscle cells, leading to stronger and faster heart contractions. Moreover, the increased amount of extracellular K+ ions may lead to lethal hyperkalemia. Therefore, clinical features of oleander poisoning are similar to digoxin toxicity and include nausea, diarrhea, and vomiting due to stimulation of the area postrema of the medulla oblongata, neuropsychic disorders, and pathological motor manifestations. Cardiotoxic glycosides are also responsible for stimulating the vagus nerve (leading to sinus bradycardia) and the phrenic nerve (leading to hyperventilation), and lethal brady- and tachyarrhythmias, including asystole and ventricular fibrillation. Oleander poisoning can also result in blurred vision, and vision disturbances, including halos appearing around objects. Oleander sap can cause skin irritations, severe eye inflammation and irritation, and allergic reactions characterized by dermatitis.
The severity of the intoxication can vary based on the quantity ingested and an individual's physiological response, as well as the time of symptom onset after oleander ingestion: they can rapidly occur after drinking teas prepared with oleander leaves or roots or develop more slowly due to the ingestion of unprepared plant parts.
Treatment
Poisoning and reactions to oleander plants are evident quickly, requiring immediate medical care in suspected or known poisonings of both humans and animals. Induced vomiting and gastric lavage are protective measures to reduce absorption of the toxic compounds. Activated carbon may also be administered to help absorb any remaining toxins. Further medical attention may be required depending on the severity of the poisoning and symptoms. Temporary cardiac pacing will be required in many cases (usually for a few days) until the toxin is excreted.
Digoxin immune fab is the best way to cure an oleander poisoning if inducing vomiting has no or minimal success, although it is usually used only for life-threatening conditions due to side effects.
Drying of plant materials does not eliminate the toxins. It is also hazardous for animals such as sheep, horses, cattle, and other grazing animals, with as little as 100 g being enough to kill an adult horse. Plant clippings are especially dangerous to horses, as they are sweet. In July 2009, several horses were poisoned in this manner from the leaves of the plant. Symptoms of a poisoned horse include severe diarrhea and abnormal heartbeat. Aśvamāra (अश्वमार) in Sanskrit refers to this plant, meaning Aśva ‘horse’ and Māra ‘killing’. There is a wide range of toxins and secondary compounds within oleander, and care should be taken around this plant due to its toxic nature. Different names for oleander are used around the world in different locations, so, when encountering a plant with this appearance, regardless of the name used for it, one should exercise great care and caution to avoid ingestion of any part of the plant, including its sap and dried leaves or twigs. The dried or fresh branches should not be used for spearing food, for preparing a cooking fire, or as a food skewer. Many of the oleander relatives, such as the desert rose (Adenium obesum) found in East Africa, have similar leaves and flowers and are equally toxic.
Research
Drugs derived from N. oleander have been investigated as a treatment for cancer, but have failed to demonstrate clinical utility. According to the American Cancer Society, the trials conducted so far have produced no evidence of benefit, while they did cause adverse side effects.
Culture
In a research study done by Haralampos V. Harissis, he claims that the laurel the Pythia is commonly depicted with is actually an oleander plant, and the poisonous plant and its subsequent hallucinations are the source of the oracle's mystical power and subsequent prophecies. Many of the symptoms that primary sources such as Plutarch and Democritus report align with results of oleander poisoning. Harissis also provides evidence claiming that the word laurel may have been used to describe an oleander leaf.
Folklore
The toxicity of the plant makes it the center of an urban legend documented on several continents and over more than a century. Often told as a true and local event, typically an entire family, or in other tellings a group of scouts, succumbs after consuming hot dogs or other food roasted over a campfire using oleander sticks. Some variants tell of this happening to Napoleon's or Alexander the Great's soldiers.
There is an ancient account mentioned by Pliny the Elder in his Natural History, who described a region in Pontus in Turkey where the honey was poisoned from bees having pollinated poisonous flowers, with the honey left as a poisonous trap for an invading army. The flowers have sometimes been mis-translated as oleander, but oleander flowers are nectarless and therefore cannot transmit any toxins via nectar. The actual flower referenced by Pliny was either Azalea or Rhododendron, which is still used in Turkey to produce a hallucinogenic honey.
Oleander is the official flower of the city of Hiroshima, having been the first to bloom following the atomic bombing of the city in 1945.
In painting
Oleander was part of subject matter of paintings by famous artists including:
Gustav Klimt, who painted "Two Girls with an Oleander" between 1890 and 1892.
Vincent van Gogh painted his famous "Oleanders" in Arles in 1888. Van Gogh found the flowers "joyous" and "life-affirming" because of their inexhaustible blooms and vigour.
Anglo-Dutch artist Sir Lawrence Alma-Tadema incorporated oleanders into his classically inspired paintings, including "An Oleander" (1882), "Courtship", "Under the Roof of Blue Ionian Weather" and "A Roman Flower Market" (1868).
"The Terrace at Méric (Oleanders)", an 1867 Impressionist painting by Frédéric Bazille.
In literature, film and music
Janet Fitch's 1999 novel White Oleander is centered around a young Southern California girl's experiences growing up in foster care after her mother is imprisoned for poisoning an ex-boyfriend with the plant. The book was adapted into a 2002 film of the same name starring Michelle Pfeiffer and Alison Lohman.
In the 17th century AD Farsi-language book the Jahangirnama, the Mughal emperor Jahangir passes a stream overgrowing with oleanders along its banks. He orders the nobles in his train to adorn their turbans with oleander blossoms, creating a "field of flowers" on their heads.
Steely Dan's 1973 song "My Old School" contains the line "Oleanders growing outside her door, soon they're gonna be in bloom up in Annandale" in the second verse. It has been theorized that this reference is either a metaphor for a harmful relationship, or marijuana, which is the subcontext of the song.
The Yeasayer song "I Am Chemistry" contains the refrain "My momma told me not to fool with oleander, and never handle the deadly quaker buttons again".
Indie rock band Mother Mother has a song called "Oleander" on their 2011 album Eureka.
In video games
Red Dead Redemption 2 features a deadly plant, oleander sage, which may be used to craft poisonous weapons, and is based on nerium oleander.