西藏柏木 xi zang bai mu

Cupressus tongmaiensis Silba; C. tongmaiensis var. ludlowii Silba; C. tonkinensis Silba.

Trees to 45 m tall; trunk to 3.5 m d.b.h.; branchlets loosely or densely arranged, terete, ultimate ones pendulous or irregularly spreading, slender, 1-1.4 mm in diam. Leaves closely arranged, scalelike, 1-1.8 mm, flat or slightly gibbous and with a rounded, sometimes inconspicuous central abaxial gland, apex usually slightly obtuse. Pollen cones 3-6 mm; microsporophylls 14-18. Seed cones dark grayish brown when ripe, not glaucous, broadly ovoid or subglobose, 1.2-2 × 1-1.8 cm; cone scales (8-) 10-12, each fertile scale with numerous seeds; bracts with a prominent umbo or mucro at apex. Seeds ovate-oblong, flattened, 3-5 mm. 2n = 22.

Mountains; 1800-2800 m. E and S Xizang [?Bhutan, N India, Kashmir, Nepal, ?Sikkim, ?Vietnam]