bio.wikisort.org - Plant

Pinus squamata, the Qiaojia pine (zh: 巧家五针松) or southern lacebark pine,[2] is a critically endangered[1] pine native to a single locality consisting of about 20 trees in Qiaojia County, northeast Yunnan, China, at about 2,200 m (7,200 ft) elevation.

Qiaojia pine Pinus squamata
Conservation status
Critically Endangered  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
(unranked):	Gymnosperms
Division:	Pinophyta
Class:	Pinopsida
Order:	Pinales
Family:	Pinaceae
Genus:	Pinus
Subgenus:	P. subg. Strobus
Section:	P. sect. Quinquefoliae
Subsection:	P. subsect. Gerardianae
Species:	P. squamata
Binomial name
Pinus squamata X.W.Li, 1992
Synonyms
P. bungeana subsp. squamata (X.W.Li) Silba

The Qiaojia pine was discovered in April 1991 by Pangzhao J.Q. It was studied later that year and described the following year by Li Xiang-Wang. It shows similarities to Rzedowski's Pinyon and some other pinyon pines.

Description

Its mature height is unknown because none of the living trees are yet mature, but they could possibly grow to 30 m (98 ft) or greater. Its habitat is open secondary woodland, scrub, and grassland mixed with Yunnan pine.

The Qiaojia pine has a conic crown with flaky pale gray-green bark becoming dark brown with age, similar to the closely related lacebark pine. The shoots are reddish to greenish brown and may be pubescent or glabrous. The leaves are drooping in fascicles of 4 or 5, 9–17 cm (3.5–6.7 in) long by 0.8 mm (0.031 in) wide, glossy green above with white stomatal bands on the underside.

The cones are conic to ovoid, reddish brown, and 9 cm (3.5 in) long by 6 cm (2.4 in) broad when open. They open at maturity in September to October of the second year to release the oblong black seeds, 4–5 mm (0.16–0.20 in) long with a 16 mm (0.63 in) wing.[3]

Conservation

Pinus squamata is the rarest of world pine species, with the endangered Torrey pine, Pinus torreyana, being the next most rare pine species.[4] This species has an extremely restricted range, known from only a very small area which is essentially one location. It seems to be a naturally very rare taxon and there is no indication for there having been any past reduction and likewise no evidence for any continuing decline. Hence the species is listed as Critically Endangered under criterion D on the basis of the very small population – around 18-20 mature individuals.

References

External links

• Flora of China
• Photo of cones

На других языках

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[de] Pinus squamata

Pinus squamata ist eine Pflanzenart aus der Gattung der Kiefern (Pinus) innerhalb der Familie der Kieferngewächse (Pinaceae). Die Stammborke löst sich in unregelmäßigen Schuppen. Dieser Endemit kommt nur an einem Fundort im nordöstlichen Teil der chinesischen Provinz Yunnan vor und es gibt nur etwa 36 Exemplare, davon etwa 20 ausgewachsen. Sie ist damit wahrscheinlich die seltenste Kiefernart und eine der seltensten Koniferen überhaupt. Sie wird daher in der Roten Liste der IUCN als vom „Aussterben bedroht“ eingestuft.[1]

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- [en] Pinus squamata

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[es] Pinus squamata

Pinus squamata (pino Qiaojia; zh: 巧家五针松) es una especie en peligro crítico de extinción[1] pino nativo que se encuentra en un solo local que consiste en tan solo 20 árboles al noreste de Yunnan, China, ubicados a unos 2200 msnm. Fue descrito en 1992 y está en peligro crítico. Su altura en la madurez es desconocida porque ninguno de los árboles vivos son maduros, pero podrían alcanzar probablemente los 30 m o más. Su hábitat son zonas de arbolado secundario abierto, de arbustos, y prado mezclado con pino de Yunnan.

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