Habitat and Ecology
Habitat & Distribution
Molecular Biology and Genetics
Barcode data: Pinus squamata
Statistics of barcoding coverage: Pinus squamata
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
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.
- 1998Critically Endangered
There are about 36 trees, 20 of which are mature. (Wu and Raven 1999). A more recent count gave 29 mature and juvenile trees in total (State Forest Bureau 2009). There is limited natural regeneration. The latest reports indicate that there are 18 coning trees. Seedling survival was reported to be low.
This tiny population occurs on a partly deforested mountain on a NW-facing slope, surrounded by fire-prone grass and scrubland. State Forest Bureau report (2009) expresses concern that genetic pollution with Pinus yunnanensis may be a threat. In the severe winter of 2008 three individuals died because of the heavy snow fall.
Pinus squamata, Qiaojia pine, zh: 巧家五针松) southern lacebark pine, is a critically endangered pine native to a single locality consisting of about 20 trees in northeast Yunnan, 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 to Rzedowski's Pinyon and some other pinyon pines.
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.
- Yang, 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. ISBN 978-0881929744.
- Gymnoperm database (2008) Pinus squamata
- Hogan, C. Michael (2008) Torrey Pine: Pinus torreyana, Globaltwitcher, ed. Nicklas Stromberg
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