西藏石杉 xi zang shi shan

Lycopodium tibeticum Ching, Bull. Fan Mem. Inst. Biol., Bot. 10: 17. 1940.

Plants terrestrial. Stem erect or ascending, 2-10 cm, 1-3 mm in diam. at middle, together with leaves 5-8 mm wide, 1-3 times dichotomously branched, upper portion often with bulbils. Leaves sparse, or dense on some small individuals, angled upward or attached at right angles with stem, lustrous, lanceolate or narrowly elliptic, nearly as wide at base as middle, oblique upward, 2-5 mm, (0.8-)1-1.2 mm wide at middle, leathery to papery, abaxially arc-shaped, both surfaces glabrous, midrib indistinct, base truncate, decurrent, sessile, margin involute, straight and not crispate, entire, apex acute. Sporophylls homomorphic with trophophylls; sporangia not visible or visible on both sides of sporophylls, yellowish, reniform.

● Alpine wet meadows and wetlands; 2700-3300 m. NW Yunnan (Gongshan).

Despite its name, Huperzia tibetica does not occur in Xizang. Its leaves are sparsely arranged (especially in larger individuals), with margins straight and apex acute, differing from H. appressa.