Pinus squamata
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Pinus squamata, the Qiaojia pine (zh: 巧家五针松) or southern lacebark pine,[1] is a critically endangered[2] pine native to a single locality consisting of about 20 trees in Qiaojia County, northeast Yunnan, China, at about Template:Convert elevation.
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 Template:Convert 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, Template:Convert long by Template:Convert wide, glossy green above with white stomatal bands on the underside.
The cones are conic to ovoid, reddish brown, and Template:Convert long by Template:Convert broad when open. They open at maturity in September to October of the second year to release the oblong black seeds, Template:Convert long with a Template:Convert 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
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<ref>tag; no text was provided for refs namedIUCN - ↑ Gymnosperm database (2008) Pinus squamata Template:Webarchive
- ↑ Hogan, C. Michael (2008) Torrey Pine: Pinus torreyana, Globaltwitcher, ed. Nicklas Stromberg