Pinus squamata

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

Critically Endangered  (IUCN 3.1)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
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

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]

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References
  1. Yang, Y. & Christian, T. (2013). Pinus squamata. The IUCN Red List of Threatened Species. Version 2014.2.
  2. Eckenwalder, J.E. (2009). Conifers of the World: The Complete Reference. Timber Press. ISBN 978-0881929744.
  3. Gymnoperm database (2008) Pinus squamata Archived 2006-09-27 at the Wayback Machine
  4. Hogan, C. Michael (2008) Torrey Pine: Pinus torreyana, Globaltwitcher, ed. Nicklas Stromberg


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