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"Pinus mugo, 2016, [Mugo Pine], PYE-nus MYOO-go, 5x5 ft Conifer, Black Walnut Sensitive., Z2, dark green needles, bun shape, Bloom Month --, In Bed U2 for 19.0 years

 

The species grows 30-80 ft tall (9-24 m) with an equal width. Native to the mountains of central and southern Europe.the var. mugo is found in the Alps and Balkans. "

Best viewed @ large size

 

Pinaceae - Western and southwestern Mediterranean region

Maritime Pine

Shown: Clustered mature, male (pollen bearing) cones

 

"Pinus pinaster, the Maritime Pine, is a pine native to the western and southwestern Mediterranean region.

 

"The range extends from Portugal and Spain north to southern and western France, east to western Italy, and south to northern Morocco, with small outlying populations in Algeria and Malta (possibly introduced by man). It generally occurs at low to moderate altitudes, mostly from sea level to 600 m, but up to 2000 m in the south of its range in Morocco.

 

"Pinus pinaster is a medium-size tree, reaching 20-35 m tall and with a trunk diameter of up to 1.2 m, exceptionally 1.8 m.

 

"The bark is orange-red, thick and deeply fissured at the base of the trunk, somewhat thinner in the upper crown.

 

"The leaves ('needles') are in pairs, very stout (2 mm broad), 12-22 cm long, and bluish-green to distinctly yellowish-green.

 

"The cones are conic, 10-20 cm long and 4-6 cm broad at the base when closed, green at first, ripening glossy red-brown when 24 months old. They open slowly over the next few years, or after being heated by a forest fire, to release the seeds, opening to 8-12 cm broad.

 

"The seeds are 8-10 mm long, with a 20-25 mm wing, and are wind-dispersed.

 

"Maritime Pine is closely related to Turkish Pine, Canary Island Pine and Aleppo Pine, which all share many features with it. It is a relatively non-variable species, with constant morphology over the entire range." (Wikipedia)

   

Photographed in U.C. Botanical Garden at Berkeley - Berkeley, California

Pinus sp. (Pine)

Argentine Ant control helicopter and hopper at Haleakala National Park, Maui, Hawaii.

November 04, 1998

#981104-2101 - Image Use Policy

 

A pine is any conifer tree or shrub in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.

 

World Flora Online, created by the Royal Botanic Gardens, Kew, and Missouri Botanical Garden, accepts 187 species names of pines as current, together with more synonyms. The American Conifer Society (ACS) and the Royal Horticultural Society accept 121 species.

 

Pines are commonly found in the Northern Hemisphere.

 

Pine may also refer to the lumber derived from pine trees; it is one of the more extensively used types of lumber.

 

The pine family is the largest conifer family, and there are currently 818 named cultivars (or trinomials) recognized by the ACS. It is also a well-known type of Christmas tree.

 

Description

Pine trees are evergreen, coniferous resinous trees (or, rarely, shrubs) growing 3–80 metres (10–260 feet) tall, with the majority of species reaching 15–45 m (50–150 ft) tall. The smallest are Siberian dwarf pine and Potosi pinyon, and the tallest is an 81.8 m (268 ft) tall ponderosa pine located in southern Oregon's Rogue River-Siskiyou National Forest.

 

Pines are long lived and typically reach ages of 100–1,000 years, some even more. The longest-lived is the Great Basin bristlecone pine (P. longaeva). One individual of this species, dubbed "Methuselah", is one of the world's oldest living organisms at around 4,800 years old. This tree can be found in the White Mountains of California. An older tree, now cut down, was dated at 4,900 years old. It was discovered in a grove beneath Wheeler Peak and it is now known as "Prometheus" after the Greek immortal.

 

The spiral growth of branches, needles, and cones scales may be arranged in Fibonacci number ratios. The new spring shoots are sometimes called "candles"; they are covered in brown or whitish bud scales and point upward at first, then later turn green and spread outward. These "candles" offer foresters a means to evaluate fertility of the soil and vigour of the trees.

 

Bark

The bark of most pines is thick and scaly, but some species have thin, flaky bark. The branches are produced in regular "pseudo whorls", actually a very tight spiral but appearing like a ring of branches arising from the same point. Many pines are uninodal, producing just one such whorl of branches each year, from buds at the tip of the year's new shoot, but others are multinodal, producing two or more whorls of branches per year.

 

Foliage

Seed leaves (cotyledons) on seedlings are borne in a whorl of 4–24.

Juvenile leaves, which follow immediately on seedlings and young plants, are 2–6 centimetres (3⁄4–2+1⁄4 inches) long, single, green or often blue-green, and arranged spirally on the shoot. These are produced for six months to five years, rarely longer.

Scale leaves, similar to bud scales, are small, brown and not photosynthetic, and arranged spirally like the juvenile leaves.

Needles, the adult leaves, are green (photosynthetic) and bundled in clusters called fascicles. The needles can number from one to seven per fascicle, but generally number from two to five. Each fascicle is produced from a small bud on a dwarf shoot in the axil of a scale leaf. These bud scales often remain on the fascicle as a basal sheath. The needles persist for 1.5–40 years, depending on species. If a shoot's growing tip is damaged (e.g. eaten by an animal), the needle fascicles just below the damage will generate a stem-producing bud, which can then replace the lost growth tip.

Cones

 

Pinus radiata female (ovulate) cone

Pines are monoecious, having the male and female cones on the same tree.: 205  The male cones are small, typically 1–5 cm long, and only present for a short period (usually in spring, though autumn in a few pines), falling as soon as they have shed their pollen. The female cones take 1.5–3 years (depending on species) to mature after pollination, with actual fertilization delayed one year. At maturity the female cones are 3–60 cm long. Each cone has numerous spirally arranged scales, with two seeds on each fertile scale; the scales at the base and tip of the cone are small and sterile, without seeds.

 

The seeds are mostly small and winged, and are anemophilous (wind-dispersed), but some are larger and have only a vestigial wing, and are bird-dispersed. Female cones are woody and sometimes armed to protect developing seeds from foragers. At maturity, the cones usually open to release the seeds. In some of the bird-dispersed species, for example whitebark pine, the seeds are only released by the bird breaking the cones open. In others, the seeds are stored in closed cones for many years until an environmental cue triggers the cones to open, releasing the seeds. This is called serotiny. The most common form of serotiny is pyriscence, in which a resin binds the cones shut until melted by a forest fire, for example in P. rigida.

 

Taxonomy

Pines are gymnosperms. The genus is divided into two subgenera based on the number of fibrovascular bundles in the needle. The subgenera can be distinguished by cone, seed, and leaf characters:

 

Pinus subg. Pinus, the yellow, or hard pine group, generally with harder wood and two or three needles per fascicle. The subgenus is also named diploxylon, on account of its two fibrovascular bundles.

Pinus subg. Strobus, the white, or soft pine group. Its members usually have softer wood and five needles per fascicle. The subgenus is also named haploxylon, on account of its one fibrovascular bundle.

Phylogenetic evidence indicates that both subgenera have a very ancient divergence from one another. Each subgenus is further divided into sections and subsections.

 

Many of the smaller groups of Pinus are composed of closely related species with recent divergence and history of hybridization. This results in low morphological and genetic differences. This, coupled with low sampling and underdeveloped genetic techniques, has made taxonomy difficult to determine. Recent research using large genetic datasets has clarified these relationships into the groupings we recognize today.

 

Etymology

The modern English name "pine" derives from Latin pinus, which some have traced to the Indo-European base *pīt- ‘resin’ (source of English pituitary). Before the 19th century, pines were often referred to as firs (from Old Norse fura, by way of Middle English firre). In some European languages, Germanic cognates of the Old Norse name are still in use for pines — in Danish fyr, in Norwegian fura/fure/furu, Swedish fura/furu, Dutch vuren, and German Föhre — but in modern English, fir is now restricted to fir (Abies) and Douglas-fir (Pseudotsuga).

 

Phylogeny

Pinus is the largest genus of the Pinaceae, the pine family, which first appeared in the Jurassic period. Based on recent Transcriptome analysis, Pinus is most closely related to the genus Cathaya, which in turn is closely related to spruces. These genera, with firs and larches, form the pinoid clade of the Pinaceae. Pines first appeared during the Early Cretaceous, with the oldest verified fossil of the genus being Pinus yorkshirensis from the Hauterivian-Barremian boundary (~130-125 million years ago) from the Speeton Clay, England.

 

The evolutionary history of the genus Pinus has been complicated by hybridization. Pines are prone to inter-specific breeding. Wind pollination, long life spans, overlapping generations, large population size, and weak reproductive isolation make breeding across species more likely. As the pines have diversified, gene transfer between different species has created a complex history of genetic relatedness.

 

Distribution and habitat

Pines are native to the Northern Hemisphere, and to a few parts from the tropics to temperate regions in the Southern Hemisphere. Most regions of the Northern Hemisphere host some native species of pines. One species (Sumatran pine) crosses the equator in Sumatra to 2°S. In North America, various species occur in regions at latitudes from as far north as 66°N to as far south as 12°N.

 

Pines may be found in a very large variety of environments, ranging from semi-arid desert to rainforests, from sea level up to 5,200 m (17,100 ft), from the coldest to the hottest environments on Earth. They often occur in mountainous areas with favorable soils and at least some water.

 

Various species have been introduced to temperate and subtropical regions of both hemispheres, where they are grown as timber or cultivated as ornamental plants in parks and gardens. A number of such introduced species have become naturalized, and some species are considered invasive in some areas and threaten native ecosystems.

 

Ecology

Pines grow well in acid soils, some also on calcareous soils; most require good soil drainage, preferring sandy soils, but a few (e.g. lodgepole pine) can tolerate poorly drained wet soils. A few are able to sprout after forest fires (e.g. Canary Island pine). Some species of pines (e.g. bishop pine) need fire to regenerate, and their populations slowly decline under fire suppression regimens.

 

Pine trees are beneficial to the environment since they can remove carbon dioxide from the atmosphere. Although several studies have indicated that after the establishment of pine plantations in grasslands, there is an alteration of carbon pools including a decrease of the soil organic carbon pool.

 

Several species are adapted to extreme conditions imposed by elevation and latitude (e.g. Siberian dwarf pine, mountain pine, whitebark pine, and the bristlecone pines). The pinyon pines and a number of others, notably Turkish pine and gray pine, are particularly well adapted to growth in hot, dry semidesert climates.

 

Pine pollen may play an important role in the functioning of detrital food webs. Nutrients from pollen aid detritivores in development, growth, and maturation, and may enable fungi to decompose nutritionally scarce litter. Pine pollen is also involved in moving plant matter between terrestrial and aquatic ecosystems.

 

Wildlife

Further information: List of Lepidoptera that feed on pines

Pine needles serve as food for various Lepidoptera (butterfly and moth) species. Several species of pine are attacked by nematodes, causing pine wilt disease, which can kill some quickly. Some of these Lepidoptera species, many of them moths, specialize in feeding on only one or sometimes several species of pine. Beside that many species of birds and mammals shelter in pine habitat or feed on pine nuts.

 

The seeds are commonly eaten by birds, such as grouse, crossbills, jays, nuthatches, siskins, and woodpeckers, and by squirrels. Some birds, notably the spotted nutcracker, Clark's nutcracker, and pinyon jay, are of importance in distributing pine seeds to new areas. Pine needles are sometimes eaten by the Symphytan species pine sawfly, and goats.

 

Lumber and construction

Pines are among the most commercially important tree species valued for their timber and wood pulp throughout the world. In temperate and tropical regions, they are fast-growing softwoods that grow in relatively dense stands, their acidic decaying needles inhibiting the sprouting of competing hardwoods.[citation needed] Commercial pines are grown in plantations for timber that is denser and therefore more durable than spruce (Picea). Pine wood is widely used in high-value carpentry items such as furniture, window frames, panelling, floors, and roofing, and the resin of some species is an important source of turpentine.

 

Because pine wood has no insect- or decay-resistant qualities after logging, in its untreated state it is generally recommended for indoor construction purposes only (indoor drywall framing, for example). For outside use, pine needs to be treated with copper azole, chromated copper arsenate or other suitable chemical preservative.

 

Ornamental uses

Many pine species make attractive ornamental plantings for parks and larger gardens with a variety of dwarf cultivars being suitable for smaller spaces. Pines are also commercially grown and harvested for Christmas trees. Pine cones, the largest and most durable of all conifer cones, are craft favorites. Pine boughs, appreciated especially in wintertime for their pleasant smell and greenery, are popularly cut for decorations. Pine needles are also used for making decorative articles such as baskets, trays, pots, etc., and during the U.S. Civil War, the needles of the longleaf pine "Georgia pine" were widely employed in this. This originally Native American skill is now being replicated across the world. Pine needle handicrafts are made in the US, Canada, Mexico, Nicaragua, and India. Pine needles are also versatile and have been used by Latvian designer Tamara Orjola to create different biodegradable products including paper, furniture, textiles and dye.

 

Farming

When grown for sawing timber, pine plantations can be harvested after 25 years, with some stands being allowed to grow up to 50 (as the wood value increases more quickly as the trees age). Imperfect trees (such as those with bent trunks or forks, smaller trees, or diseased trees) are removed in a "thinning" operation every 5–10 years. Thinning allows the best trees to grow much faster, because it prevents weaker trees from competing for sunlight, water, and nutrients. Young trees removed during thinning are used for pulpwood or are left in the forest, while most older ones are good enough for saw timber.

 

A 30-year-old commercial pine tree grown in good conditions in Arkansas will be about 0.3 m (1 ft) in diameter and about 20 m (66 ft) high. After 50 years, the same tree will be about 0.5 m (1+1⁄2 ft) in diameter and 25 m (82 ft) high, and its wood will be worth about seven times as much as the 30-year-old tree. This however depends on the region, species and silvicultural techniques. In New Zealand, a plantation's maximum value is reached after around 28 years with height being as high as 30 m (98 ft) and diameter 0.5 m (1+1⁄2 ft), with maximum wood production after around 35 years (again depending on factors such as site, stocking and genetics). Trees are normally planted 3–4 m apart, or about 1,000 per hectare (100,000 per square kilometre).

 

Food and nutrients

The seeds (pine nuts) are generally edible; the young male cones can be cooked and eaten, as can the bark of young twigs. Some species have large pine nuts, which are harvested and sold for cooking and baking. They are an essential ingredient of pesto alla genovese.

 

The soft, moist, white inner bark (cambium) beneath the woody outer bark is edible and very high in vitamins A and C. It can be eaten raw in slices as a snack or dried and ground up into a powder for use as an ersatz flour or thickener in stews, soups, and other foods, such as bark bread. Adirondack Indians got their name from the Mohawk Indian word atirú:taks, meaning "tree eaters".

 

A tea is made by steeping young, green pine needles in boiling water (known as tallstrunt in Sweden). In eastern Asia, pine and other conifers are accepted among consumers as a beverage product, and used in teas, as well as wine. In Greece, the wine retsina is flavoured with Aleppo pine resin.

 

Pine needles from Pinus densiflora were found to contain 30.54 milligram/gram of proanthocyanidins when extracted with hot water. Comparative to ethanol extraction resulting in 30.11 mg/g, simply extracting in hot water is preferable.

 

In traditional Chinese medicine, pine resin is used for burns, wounds and dermal complaints.

 

Culture

Pines have been a frequently mentioned tree throughout history, including in literature, paintings and other art, and in religious texts.

 

Literature

Writers of various nationalities and ethnicities have written of pines. Among them, John Muir, Dora Sigerson Shorter, Eugene Field, Bai Juyi, Theodore Winthrop, and Rev. George Allan D.D.

 

Pines are often featured in art, whether painting and fine art, drawing, photography, or folk art.

 

Religious texts

Pine trees, as well as other conifers, are mentioned in some verses of the Bible, depending on the translation. In the Book of Nehemiah 8:15, the King James Version gives the following translation:

 

"And that they should publish and proclaim in all their cities, and in Jerusalem, saying, Go forth unto the mount, and fetch olive branches, and pine branches [emphasis added], and myrtle branches, and palm branches, and branches of thick trees, to make booths, as it is written."

 

However, the term here in Hebrew (עץ שמן) means "oil tree" and it is not clear what kind of tree is meant. Pines are also mentioned in some translations of Isaiah 60:13, such as the King James:

 

"The glory of Lebanon shall come unto thee, the fir tree, the pine tree, and the box together, to beautify the place of my sanctuary; and I will make the place of my feet glorious."

 

Again, it is not clear what tree is meant (תדהר in Hebrew), and other translations use "pine" for the word translated as "box" by the King James (תאשור in Hebrew).

 

Some botanical authorities believe that the Hebrew word "ברוש" (bərōsh), which is used many times in the Bible, designates P. halepensis, or in Hosea 14:8 which refers to fruit, Pinus pinea, the stone pine. The word used in modern Hebrew for pine is "אֹ֖רֶן" (oren), which occurs only in Isaiah 44:14, but two manuscripts have "ארז" (cedar), a much more common word.

 

Chinese culture

The pine is a motif in Chinese art and literature, which sometimes combines painting and poetry in the same work. Some of the main symbolic attributes of pines in Chinese art and literature are longevity and steadfastness: the pine retains its green needles through all the seasons. Sometimes the pine and cypress are paired. At other times the pine, plum, and bamboo are considered as the "Three Friends of Winter".[60] Many Chinese art works and/or literature (some involving pines) have been done using paper, brush, and Chinese ink: interestingly enough, one of the main ingredients for Chinese ink has been pine soot.

Pinus sp. (Pine)

Habit spreading into Koolau Gap with Forest at Switchbacks Haleakala National Park, Maui, Hawaii.

September 17, 2014

#140917-5009 - Image Use Policy

 

Waldkiefer (Pinus sylvestris) in einem Mischwald mit Buchen und Eichen in der Schwetzinger Hardt bei Neuschnee am 3. Dezember 2017

Wald-Kiefer (Pinus sylvestris) bei Hockenheim

Uma fábrica de goma de pinheiro.

A resina extraída dos pinus se transforma em breu e terebintina que tem os mais diversos usos industriais, desde a indústria farmacêutica e alimentícia chegando até a vernizes, borrachas, adesivos, etc.

Waldkiefer (Pinus sylvestris) in einem Mischwald mit Buchen und Eichen in der Schwetzinger Hardt bei Neuschnee am 3. Dezember 2017

Pinus brutia, commonly known as the Turkish pine, is a species of pine native to the eastern Mediterranean region. The bulk of its range is in Turkey.

Turkish pine is also known by several other common names: Calabrian pine (from a naturalised population of the pine in Calabria in southern Italy, from where the pine was first botanically described), East Mediterranean pine, and Brutia pine.

 

ES: pino de Chipre

IT: pino calabro

 

Real Jardín Botánico, Madrid

  

20221012_162845

Revueflex SD1, Kodak Portra 160, Takumar 55mm f1.8

Wald-Kiefer (Pinus sylvestris) bei Hockenheim

Pinus radiata (Monterey pine)

Habitat with Forest and Kim shadows view Hanakauhi at Halalii Flow near Silversword Loop Haleakala National Park, Maui, Hawaii.

October 16, 2012

#121016-0891 - Image Use Policy

 

Umgestürzte Waldkiefer (Pinus sylvestris) in der Schwetzinger Hardt

Zone: 2-7

Height: 1ft. tall and 2ft. wide

 

This exciting new selectoin from Denmark naturally has the aesthetics associated with an ancient skillfully manicured bonsai specimen. The dark green needles are set artfully against the strong trunk and branch structure giving the slow-growing pine the look of venerable age and beauty without the need for human manipulation.

 

Hickory Hollow Nursery and Garden Center

713 Route 17

Tuxedo, NY 10987

tel 845.351.7226

fax 845.351.7207

email hickoryhollow@optonline.net

www.facebook.com/pages/Hickory-Hollow-Nursery-and-Garden-...

call or email for pricing

RHS Wisley Gardens in Surrey ...

 

From Wikipedia -

Patula pine, pino patula, Pinus patula (spreading-leaved pine, Mexican weeping pine, pino llorón in Spanish) (patula Latin = spreading) is a tree native to the highlands of Mexico. It grows from 24° to 18° North latitude and 1800 to 2700 m above sea level. 30 m tall. It does not stand long periods of temperatures as low as –10°C, but resists occasional brief below zero dips. It is moderately drought-tolerant, in this scope is superior than Pinus taeda. Rainfall range is from 750 to 2000 mm annual average, it happens mostly in summer but in a little area of the State of Veracruz on the Sierra Madre Oriental its habitat is rainy year round.

 

It is planted at high altitudes in Ecuador (3500 metres), Bolivia, Colombia (3300 metres), Kenya, Tanzania, Angola, Zimbabwe, Papua New Guinea, and Hawaii (3000 metres). In Hawaii it is replacing the native alpine grassland.

 

At lower altitudes than its origin country it is cultivated in Southern Brazil, South Africa, India, and in the Argentine provinces of Córdoba and San Luis. it is planted for forestation purposes in lands originally covered by bushland.

 

It has been introduced near sea level in New South Wales, Australia, where it spreads naturally by wind and is very favored because rainfalls are more abundant in summer. It was also introduced in New Zealand for commercial purposes and is fully naturalized there. It is cultivated in the United Kingdom as an ornamental tree for parks and gardens, and has gained the Royal Horticultural Society's Award of Garden Merit.

 

The timber is pale-pink to salmon, moderately soft, brittle and smelling strongly of aniseed when freshly cut.

Solitäre Wald-Kiefer (Pinus sylvestris) am „Wingertsbuckel“ bei Oftersheim

Fujinon 5cm f/1.2 LTM (M39) + Fujifilm X-Pro2.

Zone: 2-7

Height: 3-4ft. tall and 2.5f-3ft. wide

 

This genuinely dwarf selection grows into a low, dense dome that stays compact without shearing. The mounding plant has a smooth appearance that comes from many evenly spaced needles growing at a uniform rate on abundant branchlets. During most of the year, 'Mops' displays a hint of gray/blue in its green, but during the crisp, cold months, needles take on a warm golden hue.

 

Hickory Hollow Nursery and Garden Center

713 Route 17

Tuxedo, NY 10987

tel 845.351.7226

fax 845.351.7207

email hickoryhollow@optonline.net

www.facebook.com/pages/Hickory-Hollow-Nursery-and-Garden-...

call or email for pricing

Wald-Kiefer (Pinus sylvestris) bei Hockenheim

Best viewed @ large size

 

Pinaceae - Mexico

Mexican Weeping Pine, Pino llorón, Patula Pine

Shown: Maturing female cones

 

"Patula Pine, Pinus patula (Mexican weeping pine, pino llorón in Spanish)(patula Latin = spreading) is a tree native to Mexico. It grows from 24° to 18° North latitude and 1800 to 2700 m above sea level. 30 m tall. It does not stand long periods of temperatures as low as –10°C, but occasionally it resist them and even lower. It is moderately drought tolerant, in this scope is superior than Pinus taeda. Rainfall range is from 750 to 2000 mm annual average, it happens mostly in summer but in a little area of the State of Veracruz on the Sierra Madre Oriental its habitat is rainy year round.

 

"Planted at high altitudes in Ecuador (3500 m), Bolivia, Colombia (3300m), Kenya, Tanzania, Angola, Zimbabwe, Papua New Guinea, Hawaii (3000 m), in Hawaii it is replacing the native alpine grassland. It is cultivated in at lower altitudes than its origin country: Southern Brazil, South Africa, India, and in the Argentine provinces of Córdoba and San Luis[1]it is planted for forestation purposes for creating forest in lands originally covered by bushland. It has been introduced near sea level : New South Wales, Australia, where it spreads naturally by wind and is very favored because rainfalls are more abundant in summer. Also introduced in New Zealand with commercial purposes is fully naturalized. Cultivated in United Kingdom as ornamental and grows well." (Wikipedia)

 

Additional views:

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Photographed in U.C. Botanical Garden at Berkeley - Berkeley, California

  

Pinus Pinea - Photo taken in Sagres -Portugal

2009

Pinus Pinea - South of Portugal - Europe

Pueyo, Belchite, Zaragoza, Spain

Waldkiefer (Pinus sylvestris) in Hockenheim

Pinus Pinea

Sagres Portugal

Photo May 2009

Scotts Pine (Pinaceae) - Alice Holt, Farnham, Surrey.

The genus Pinus (Pines) has leaves (needles) which have shoots with bunches of 2, 3, or 5 leaves, each bunch enclosed in a sheath of papery bracts. The number of needles helps identification, but occasionally there are bunches with a nonstandard number of leaves, so several shoots need to be examined. Cones are mostly more or less egg-shaped (ovoid) with hard, woody scales.

P. sylvestris is probably UK's most common Pine and the only native one (in Scotland). Leaves are in bunches of 2, glaucus, 4-10cm long, broad and with a twist; well branched trunk with orangey-red bark in upper parts; cone scales without prickle on outer face.

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