Pinus squamata
| Qiaojia pine Pinus squamata | |
|---|---|
Scientific classification
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| 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 | |
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Pinus squamata,theQiaojia pine(zh:Xảo gia ngũ châm tùng ) orsouthern lacebark pine,[2]is acritically endangered[1]pinenative to a single locality consisting of about 20 trees inQiaojia County,northeastYunnan,China,at about 2,200 m (7,200 ft) 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 toRzedowski's Pinyonand some otherpinyon pines.
Description[edit]
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 withYunnan pine.
The Qiaojia pine has a conic crown with flaky pale gray-green bark becoming dark brown with age, similar to the closely relatedlacebark pine.The shoots are reddish to greenish brown and may be pubescent or glabrous. Theleavesare 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 whitestomatalbands on the underside.
Theconesare 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[edit]
Pinus squamatais the rarest of world pine species, with theendangeredTorrey 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[edit]
- ^abYang, Y. & Christian, T. (2013).Pinus squamata.The IUCN Red List of Threatened Species. Version 2014.2.
- ^Eckenwalder, J.E. (2009).Conifers of the World: The Complete Reference.Timber Press.ISBN978-0881929744.
- ^Gymnosperm database (2008)Pinus squamataArchived2006-09-27 at theWayback Machine
- ^Hogan, C. Michael (2008)Torrey Pine: Pinus torreyana,Globaltwitcher, ed. Nicklas Stromberg
External links[edit]
26°51′09″N103°00′48″E/ 26.85250°N 103.01333°E
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