View allAll Photos Tagged Angiosperms
Plants are multicellular, photosynthetic eucaryotes. The oldest known land plant body fossils are Silurian in age. Fossil root traces of land plants are known back in the Ordovician. The Devonian was the key time interval during which land plants flourished and Earth experienced its first “greening” of the land. The earliest land plants were small and simple and probably remained close to bodies of water. By the Late Devonian, land plants had evolved large, tree-sized bodies and the first-ever forests appeared.
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Forsythia is part of the olive family. It has bright yellow flowers and has been widely cultivated as an ornamental plant. Most species are native to eastern Asia.
Classification: Plantae, Angiospermophyta, Lamiales, Oleaceae
Locality: western side of Newark, Licking County, east-central Ohio, USA
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Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Tribe: Crotalarieae
Genus: Crotalaria
THE AGE OF FLOWERING PLANTS
ANGIOSPERM means "seed borne in vessel," while GYMNOSPERM means "naked seed," a reference to the lack of protective structure enveloping the seed. One reason that flowering plants were able to diversify so dramatically and spread during the Cretaceous and Cenozoic, or modern, the era was the evolution of new structures and tissues such as the carpel, a womb-like vessel that encloses angiosperm seeds and endosperm, a placenta-like tissue that nourishes the young plant as it develop within the seed, Today, angiosperm dominate terrestrial life on the planet. At an estimated 422,000 species, they compose by far the largest group of plants. They grow in greater range of environments, exhibits a wider range of growth habits, and display more variation in form than any living group of plants. In size, angiosperm range from tiny duckweed to eucaplytuses more than 330 ft (100 m) tall. The explosion of angiosperm diversity has gone hand in hand with the proliferation of insect, birds, and other animals that pollinate their flowers, disperse their fruits and seeds, and eat their leaves.
PLANT - The ultimate visual reference to plants and flowers of the world JANET MARINELLI
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THE AGE OF FLOWERING PLANTS
ANGIOSPERM means "seed borne in vessel," while GYMNOSPERM means "naked seed," a reference to the lack of protective structure enveloping the seed. One reason that flowering plants were able to diversify so dramatically and spread during the Cretaceous and Cenozoic, or modern, the era was the evolution of new structures and tissues such as the carpel, a womb-like vessel that encloses angiosperm seeds and endosperm, a placenta-like tissue that nourishes the young plant as it develop within the seed, Today, angiosperm dominate terrestrial life on the planet. At an estimated 422,000 species, they compose by far the largest group of plants. They grow in greater range of environments, exhibits a wider range of growth habits, and display more variation in form than any living group of plants. In size, angiosperm range from tiny duckweed to eucaplytuses more than 330 ft (100 m) tall. The explosion of angiosperm diversity has gone hand in hand with the proliferation of insect, birds, and other animals that pollinate their flowers, disperse their fruits and seeds, and eat their leaves.
PLANT - The ultimate visual reference to plants and flowers of the world JANET MARINELLI
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Mt. Kitanglad Agri-Ecological Techno Demo Center, Sinaburan, Malaybalay City PHOTOS
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Hibiscus sp. - rose mallow in Ohio, USA. (10 July 2018)
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Classification: Plantae, Angiospermophyta, Malvales, Malvaceae
Locality: cultivar in Newark, Ohio, USA
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en.wikipedia.org/wiki/Hibiscus
and
This display of F.elwesii impressed all with it's rich chocolate brown blooms on delicate nodding stems at the Boconnoc Spring Flower Show and was a deserved winner of it's class.
For a couple of weeks in May these trees put on a ridiculous show in sweet pink. Looking up from the sidewalk you see a mass of color that is just not duplicated anywhere. Almost as soon as they bloom the petals fall in masses of snowy pink drifts, and that's the end of the show for another year. Double cherries seem to be pretty hardy in Boston, but their life span is limited to about 20 years.
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Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Antigonon
Species: A. leptopus
Cornus canadensis Linnaeus, 1753 - bunchberry in Minnesota, USA (8 June 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The bunchberry shown above has a cluster of small flowers surrounded by four whitish-colored bracts (= modified leaves). One of the flowers popped open just before this photo was taken.
Classification: Plantae, Angiospermophyta, Cornales, Cornaceae
Locality: trailside, Gooseberry Falls State Park, northeastern Minnesota, USA
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Cornus kousa Buerger in Hance, 1873 - Chinese dogwood in Newark, Ohio, USA. (late May 2016)
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The Chinese dogwood is a small flowering tree that is native to eastern Asia and some far-western Pacific islands. It has been widely used as an ornamental plant.
Classification: Plantae, Angiospermophyta, Cornales, Cornaceae
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More info. at:
THE AGE OF FLOWERING PLANTS
ANGIOSPERM means "seed borne in vessel," while GYMNOSPERM means "naked seed," a reference to the lack of protective structure enveloping the seed. One reason that flowering plants were able to diversify so dramatically and spread during the Cretaceous and Cenozoic, or MODERN, the era was the evolution of new structures and tissues such as the carpel, a womb-like vessel that encloses angiosperm seeds and endosperm, a placenta-like tissue that nourishes the young plant as it develop within the seed, Today, angiosperm dominate terrestrial life on the planet. At an estimated 422,000 species, they compose by far the largest group of plants. They grow in greater range of environments, exhibits a wider range of growth habits, and display more variation in form than any living group of plants. In size, angiosperm range from tiny duckweed to eucaplytuses more than 330 ft (100 m) tall.
The explosion of angiosperm diversity has gone hand in hand with the proliferation of INSECTS, BIRDS, and OTHER ANIMALS that pollinate their flowers, disperse their fruits and seeds, and eat their leaves.
THE ULTIMATE VISUAL REFERENCE TO PLANTS AND FLOWERS OF THE WORLD - Janet Marinelli, Ed-in-Chief
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ROILO GOLEZ Mindanao Good morning world!!! Mount Apo, Mindanao
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PHOTO INFO-STORY: -wilfredosrb@ Family Life Landscapes and Nature Garden on Flick + 4 other Groups.
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Cornus canadensis Linnaeus, 1753 - bunchberry in Minnesota, USA (8 June 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The bunchberry shown above has a cluster of small flowers surrounded by four whitish-colored bracts (= modified leaves). One of the flowers popped open just before this photo was taken.
Classification: Plantae, Angiospermophyta, Cornales, Cornaceae
Locality: trailside, Gooseberry Falls State Park, northeastern Minnesota, USA
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More info. at:
THE AGE OF FLOWERING PLANTS
ANGIOSPERM means "seed borne in vessel," while GYMNOSPERM means "naked seed," a reference to the lack of protective structure enveloping the seed. One reason that flowering plants were able to diversify so dramatically and spread during the Cretaceous and Cenozoic, or modern, the era was the evolution of new structures and tissues such as the carpel, a womb-like vessel that encloses angiosperm seeds and endosperm, a placenta-like tissue that nourishes the young plant as it develop within the seed, Today, angiosperm dominate terrestrial life on the planet. At an estimated 422,000 species, they compose by far the largest group of plants. They grow in greater range of environments, exhibits a wider range of growth habits, and display more variation in form than any living group of plants. In size, angiosperm range from tiny duckweed to eucaplytuses more than 330 ft (100 m) tall. The explosion of angiosperm diversity has gone hand in hand with the proliferation of insect, birds, and other animals that pollinate their flowers, disperse their fruits and seeds, and eat their leaves.
PLANT - The ultimate visual reference to plants and flowers of the world JANET MARINELLI
IMAGES: - MINDANAO TOURIST'S DESTINATIONS and Cinchona Tree Forest Reserve, Kaatuan, Lantapan/ Laarni Felecio Magyano's PHOTOS
PHOTO INFO-STORY: -wilfredosrb
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La fleur est constituée par l’ensemble des organes de la reproduction et des « enveloppes » qui les entourent chez les angiospermes (également appelées plantes à fleurs). Après la pollinisation, la fleur est fécondée et se transforme en fruit contenant les graines.
Les fleurs peuvent être solitaires, mais elles sont le plus souvent regroupées en inflorescences.
Très tôt, les fleurs ont attiré l’attention de l’homme, qui les utilise et les cultive pour la parure (couronne de fleurs), pour l’ornementation intérieure (fleurs coupées, bouquets, ikebana) et extérieure (jardins, plates-bandes, etc.) ainsi que pour leurs odeurs et pigments. Les fleurs ont souvent inspiré les artistes, peintres, poètes, sculpteurs et décorateurs. La culture des fleurs est la floriculture ou l'horticulture.
La présence de fleurs dans le paysage, la ville, l'environnement intérieur (chambre d’hôpital, classe, bureau, cellule de prison…) induit un sentiment et des réactions psychophysiologiques, qui varient selon les personnes, les cultures, les saisons, et les contextes, qu'on commence à pouvoir quantifier.
Par exemple, on a demandé6 à 119 étudiants (52 hommes et 67 femmes, âgés en moyenne de 21 ans, répartis en 3 groupes) de remplir une tâche en 10 minutes. Le premier groupe, de contrôle, devait remplir des pots avec de la terre. Le deuxième groupe devait repiquer des plantes non fleuries (Viola × wittrockiana Sakura Sakura). Le troisième groupe devait repiquer des plants de la même espèce, mais en fleurs. Des test ont été faits avant et après l'expérience : électroencéphalogramme (EEG), électromyogramme (EMG), enregistrements du nombre de clignements d'yeux par minute et Profile of Mood States (POMS) — test mesurant les variations de l'humeur du sujet. Le ratio ondes alpha/ondes bêta avec les yeux fermés a considérablement augmenté sauf chez ceux qui ne manipulaient que de la terre. L'amplitude des ondes bêta avec les yeux ouverts a diminué chez ceux manipulant les plantes, et particulièrement les plantes fleuries de même que l'électromyogramme et la fréquence de clignotements des yeux. Le sentiment de fatigue était significativement réduit chez ceux qui ont rempoté les plantes fleuries par rapport aux autres groupes, confirmant l'effet de relaxation physiologique que procurent les plantes fleuries, plus encore que les plantes non fleuries.
Achillea millefolium Linnaeus, 1753 - red beauty common yarrow (Dawes Arboretum, Licking County, Ohio, USA)
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The common yarrow is a widely-distributed angiosperm species. Its natural distribution is Eurasia and North America. The variety shown here is man-made (a cultivar), nicknamed 'Red Beauty'.
Classification: Plantae, Angiospermophyta, Asterales, Asteraceae
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Alpinia photographed on the UC Davis campus in California. Alpinia is in the Zingiberaceae, the ginger family.
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Rudbeckia hirta Linnaeus, 1753 - black-eyed susans in Ohio, USA (25 July 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Classification: Plantae, Angiospermophyta, Asterales, Asteraceae
Locality: cultivars in Heath Community Park, Heath, Ohio, USA
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Iris sp. in Ohio, USA (1 June 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Classification: Plantae, Angiospermophyta, Asparagales, Iridaceae
Locality: cultivar in Celina, Ohio, USA
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More info. at:
Cleome hassleriana Chodat, 1898 - spider flower (Dawes Arboretum, Licking County, Ohio, USA)
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The spider flower, Cleome hassleriana (also known as Tarenaya hassleriana), is native to parts of South America.
Classification: Plantae, Angiospermophyta, Brassicales, Cleomaceae
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See info. at:
All thanks to my nephew (John_97) who helped me to take that great shot !
Kingdom : Plantae
(unranked) : Angiosperms
(unranked) : Eudicots
(unranked) : Rosids
Order : Zygophyllales
Family : Zygophyllaceae
Genus : Tribulus
Species : T. terrestris
The fruits (seeds) of this Rumex plant wind sinuously along the stem in a helical pattern. How would you characterize the color of these seeds?
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Flowering plants and non-flowering plants are the main method for natural classification of plants. Learn the characteristics of each type.
#ROSE #Plantae #Tracheophytes #Angiosperms #Eudicots #Rosids #Rosales #Rosaceae #Rosoideae #Roseae #Rosa #薔薇屬 #植物界 #被子植物 #真雙子葉植物 #薔薇類植物 #薔薇目 #薔薇科 #薔薇亞科 #गुलाबकाफूल #Rosa #الوردة #mawar #Роза #গোলাপ #ローズ 장미 #τριαντάφυλλο #ורד #Róża #růže #roos #restesig #trëndafil #վարդ #gül #arrosa #ружа #ruža #роза #နှင်းဆီ #rosas #ruusu #ვარდი #ગુલાબ #furenwardi #rózsa #hækkaði #rós #ಗುಲಾಬಿ #ກຸຫລາບ #rožu #pakilo #opgestan #raozy #റോസ് #गुलाब #сарнай #गुलाफ #ଗୋଲାପ #ګلاب #ਗੁਲਾਬ #Trandafir #گلسرخ #ubax #රෝස #ruža #vrtnica #waridi #садбарг #உயர்ந்தது #గులాబీ #ดอกกุหลาบ #троянда #atirgul #Hoahồng #Rhosyn #roas #wavuka #רויז #FLOWER #floralfriday #flowerpower #flowerpics #flowerphotography #blom #lule #ծաղիկ #gül #кветка #ফুল #цвете #flor #花 #cvijet #květina #blomst #bloem #lill #bulaklak #kukka #fleur #ყვავილების #Blume #λουλούδι #ફૂલ #flè #फूल #virág #blóm #bunga #bláth #fiore #花 #ಹೂವು #ផ្កា #꽃 #ດອກ #florem #zieds #gėlė #цвет #fjura #blomst #kwiat #floare #цветок #kvetina #cvet #maua #blomma #மலர் #పువ్వు #ดอกไม้ #çiçek #квітка #hoa #blodau #wâbigin#nature #aard #natyrë #բնություն #təbiət #natura #প্রকৃতি #priroda #природа #naturalesa #kinaiyahan #chikhalidwe #大自然 #příroda #natur #natuur #loodus #kalikasan #luonto #natureza #ბუნება #natur #φύση #પ્રકૃતિ #yanayi #प्रकृति #természet #eðli #alam #nádúr #natura #自然 #ಪ್ರಕೃತಿ #табиғат #ធម្មជាតិ #자연 #ລັກສະນະ #daba #pobūdis #природата #പ്രകൃതി #निसर्ग #သဘာဝ #प्रकृति #natură #природа #narava #naturaleza #табиат #இயல்பு #ప్రకృతి #ธรรมชาติ #doğa #tabiat #натура #PLANTS #houseplants #plante #Pflanze #planta #pianta #растение #roślina #rostlina #植物 #식물 #पौधा #উদ্ভিদ #tanaman #النبات #växt #צמח #kitiganens #kitigân #bimë #ተክል #աճեցնել #bitki #landare #расліна #biljka #အပင် #halaman მცენარე #φυτό #છોડ #nroj #növény #osisi #menanam #tanduran #ಸಸ್ಯ #өсімдік #រុក្ខជាតិ #igihingwa #өсүмдүк #ພືດ #augs #പ്ലാന്റ് #pjanta #वनस्पती #тарих #ଉଦ୍ଭିଦ #نبات #ਪੌਦਾ #ਪੌਦਾ #plantă #laʻau #биљка #ٻوٽو #rastlina #tutuwuhan #ஆலை #үсемлек #మొక్క #ปลูก #bitki #ösümlik #Рослина #پودا #ئۆسۈملۈك #o'simlik #cây #planhigyn #isityalo #געוויקס #isitshalo
En biologie, chez les plantes à fleurs (angiospermes), la fleur constitue l'organe de la reproduction sexuée et l'ensemble des « enveloppes » qui l'entourent. Après la pollinisation, la fleur est fécondée et se transforme en fruit contenant les graines. Les fleurs peuvent être solitaires, mais elles sont le plus souvent regroupées en inflorescences.
Très tôt, les fleurs ont attiré l’attention de l’homme, qui les utilise et les cultive pour la parure (couronne de fleurs), pour l’ornementation intérieure (fleurs coupées, bouquets, ikebana) et extérieure (jardins, plates-bandes, etc.) ainsi que pour leurs odeurs et pigments. Les fleurs ont souvent inspiré les artistes, peintres, poètes, sculpteurs et décorateurs. La culture des fleurs est la floriculture, une branche de l'horticulture.
La plupart des fleurs sont hermaphrodites, c'est-à-dire qu'elles ont à la fois des organes reproducteurs mâles et femelles : elles ont un pistil et des étamines. Les étamines sont la partie mâle (qui libère du pollen), et le pistil la partie femelle (qui reçoit le pollen). Certaines plantes comme le pistachier ou le kiwi ont des fleurs qui ne sont pas hermaphrodites : elles sont soit mâles, soit femelles, les scientifiques parlent de fleurs gonochoriques. D'autres plantes comme l'avocatier ont des fleurs qui sont successivement mâles et femelles, on parle alors d'hermaphrodisme successif.
La fleur hermaphrodite est constituée de pièces florales insérées sur un réceptacle floral. Lorsque la fleur est complète, elle comprend quatre verticilles de pièces florales. De l'extérieur vers l'intérieur, on rencontre :
le calice, formé par l'ensemble des sépales ;
la corolle, formée par l'ensemble des pétales ;
l'androcée, c'est-à-dire l'ensemble des étamines (partie mâle), qui produit le pollen ;
le gynécée ou pistil, formé par l'ensemble des carpelles (partie femelle).
Calice et corolle forment le périanthe, enveloppe stérile, qui joue un rôle protecteur pour les pièces fertiles, et attractif pour les animaux pollinisateurs.
Ce plan théorique de la fleur, que l'on trouve typiquement chez le bouton d'or (Renonculacées), est sujet à de nombreuses variations. On rencontre par exemple des fleurs sans pétales, dites « apétales ». Une fleur mixte est une fleur qui possède à la fois étamines et pistil.
« La fleur double est celle dont quelqu'une des parties est multipliée au-delà de son nombre naturel, mais sans que cette multiplication nuise à la fécondation. Les fleurs se doublent rarement par le calice, presque jamais par les étamines. Leur multiplication la plus commune se fait par la corolle. Les exemples les plus fréquents sont dans les fleurs polypétales, comme œillets, anémones, renoncules ; les fleurs monopétales doublent moins communément. Cependant on voit assez souvent des campanules, des primevères auricules, et surtout des jacinthes à fleur double. Ce mot de fleur double ne marque pas dans le nombre des pétales une simple duplication, mais une multiplication quelconque. Soit que le nombre des pétales devienne double, triple, quadruple, etc., tant qu'ils ne multiplient pas au point d'étouffer la fructification, la fleur garde toujours le nom de fleur double ; mais, lorsque les pétales trop multipliés font disparaître les étamines et avorter le germe, alors la fleur perd le nom de fleur double et prend celui de fleur pleine. »
THE AGE OF FLOWERING PLANTS
ANGIOSPERM means "seed borne in vessel," while GYMNOSPERM means "naked seed," a reference to the lack of protective structure enveloping the seed. One reason that flowering plants were able to diversify so dramatically and spread during the Cretaceous and Cenozoic, or modern, the era was the evolution of new structures and tissues such as the carpel, a womb-like vessel that encloses angiosperm seeds and endosperm, a placenta-like tissue that nourishes the young plant as it develop within the seed, Today, angiosperm dominate terrestrial life on the planet. At an estimated 422,000 species, they compose by far the largest group of plants. They grow in greater range of environments, exhibits a wider range of growth habits, and display more variation in form than any living group of plants. In size, angiosperm range from tiny duckweed to eucaplytuses more than 330 ft (100 m) tall. The explosion of angiosperm diversity has gone hand in hand with the proliferation of insect, birds, and other animals that pollinate their flowers, disperse their fruits and seeds, and eat their leaves.
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Iris sp. in Ohio, USA (1 June 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Classification: Plantae, Angiospermophyta, Asparagales, Iridaceae
Locality: cultivar in Celina, Ohio, USA
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Found in Ayn Razat, Salalah, Dhofar, Oman.
Kingdom : Animalia
Phylum : Arthropoda
Class : Insecta
Order : Lepidoptera
Family : Nymphalidae
Genus : Danaus
Species : Danaus chrysippus
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Kingdom : Plantae
(unranked) : Angiosperms
(unranked) : Eudicots
(unranked) : Asterids
Order : Asterales
Family : Asteraceae
Tribe : Heliantheae
Genus : Tridax
Species : Tridax procumbens
Acalypha reptans Sw., EUPHORBIACEAE. Entre las plantas angiospermas, es decir, aquellas que sus flores son capaces de formar fruto, se destaca la familia Euphorbiacea, no sólo por su gran cantidad de especies sino también por su gran diversidad de formas: muchas son cactiformes, otras son hierbas y no pocas son árboles. La inflorescencia de la especie que mostramos en la foto es realmente curiosa y llamativa.
Playa del Algarrobico
Comarca del Levante Almeriense
Andalucía
Kingdom:Plantae
Clade:Tracheophytes
Clade:Angiosperms
Clade:Eudicots
Clade:Asterids
Order:Asterales
Family:Asteraceae
Genus:Calendula
Species:C. stellata
Lathyrus latifolius Linnaeus, 1753 - perennial pea in Ohio, USA. (18 June 2016)
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
The perennial pea is an angiosperm that is native to Europe but now occurs in other parts of the Old World, plus the New World. Flowers are zygomorphic (= bilaterally symmetrical, but not radial) and pale pink to intensely pink-colored.
Classification: Plantae, Angiospermophyta, Fabales, Fabaceae
Locality: roadside, northern side of Rt. 78, between Arnold Road and Interstate 77, western side of the town of Caldwell, central Noble County, eastern Ohio, USA (~39° 44' 22.11" North latitude, ~81° 32' 11.36" West longitude)
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Iris sp. in Ohio, USA (1 June 2015).
Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago).
The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction.
Classification: Plantae, Angiospermophyta, Asparagales, Iridaceae
Locality: cultivar in Celina, Ohio, USA
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More info. at: