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Pinus yunnanensis

Pinus yunnanensis
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Product Information
Specification

Scientific name: Pinus yunnanensis  Franchet  1899

Common names:Yunnan pine, Yun nan song (Chinese)

 

Description

Tree to 30 m tall, or shrub not exceeding 2 m where subjected to frequent fires. Trunk to 1 m in diameter. Bark bright reddish brown, smooth, and peeling above, finally becoming dark gray and broken up into elongate, scaly plates by deep furrows. Crown dense, broadly conical, eventually flattening with age, with numerous short branches densely clothed with foliage near the ends. Twigs coarse, pinkish to reddish brown, hairless, rough with the bases of scale leaves. Buds 2-3 cm long, not resinous. Needles in bundles of (two or) three, each needle (7-)10-25(-30) cm long, slender, flexible or a little stiff, drooping, lasting 2(-3) years, light green. Individual needles with a few lines of stomates on both the inner and outer faces, and three to five resin canals all around the two-stranded midvein, the two at the outer corners usually midway to the needle surface, the others at the surface. Sheath 10-15 mm long, persisting and falling with the bundle. Pollen cones 15-30 mm long, yellowish brown. Seed cones (4-)5-9(-11) cm long, egg-shaped, with 75-100 seed scales, green before maturity, ripening glossy pale yellowish brown at first and progressively darkening to rich brown, opening widely to release the seeds or remaining closed for another year and persisting for up to several years before falling with the short, stout stalk to 1 cm long. Seed scales irregularly spoon-shaped, the exposed face horizontally diamond-shaped to six- sided, scarcely protruding, crossed by an inconspicuous ridge topped by a small, flat, diamond-shaped umbo bearing a tiny prickle. Seed body 4-5 mm long, the easily detachable wing another 12-16 mm long.

Mountainous region of southwestern China, in Yunnan (hence the scientific and common names) and adjacent parts of Xizang (Tibet), Sichuan, Guizhou, and Guangxi. Forming pure, dense to open stands or mixed with other conifers and hardwoods on mountain slopes and in adjacent river valleys. (400-)600-2,600(-3,400) m.

 

Conservation Status

Red List Category & Criteria: Least Concern

(As this species is common and widespread, it is assessed as Least Concern)

 

References

Farjon, A. (2010). A Handbook of the World's Conifers. Koninklijke Brill, Leiden.

Eckenwalder, J.E. (2009) Conifers of the World: The Complete Reference. Timber Press, Portland.

IUCN Red List of Threatened Species, International Union for Conservation of Nature and Natural Resources. Cambridge, UK /Gland, Switzerland

 

Copyright © Aljos Farjon, James E. Eckenwalder, IUCN, Conifers Garden. All rights reserved.

Product CodePINS4LH970
Weight0.01 kg


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