四川石杉 si chuan shi shan

Lycopodium sutchuenianum Herter, Bot. Jahrb. Syst. 43(1, Beibl. 98): 43. 1909; Huperzia minimadenta J. F. Cheng; L. serratum Thunberg var. alpestre Christ; Urostachys sutchuenianus (Herter) Herter.

Plants terrestrial. Stem erect or ascending, 8-15(-18) cm, 1.2-3 mm in diam. at middle, together with leaves 1.5-1.7 cm wide, 2 or 3 times dichotomously branched, upper portion often with bulbils. Leaves dense, attached at right angles with stem, angled upward, or slightly reflexed, not lustrous, lanceolate, slightly contracted toward base, straight or falcate, 5-10 × 0.8-1 mm, leathery, both surfaces glabrous, midrib indistinct, base cuneate or subtruncate, decurrent, sessile, margin straight and not crispate, sparsely toothed, apex acuminate; teeth small, acute. Sporophylls homomorphic with trophophylls; sporangia visible on both sides of sporophylls, yellowish, reniform.

● Wet places in forests, shrubs, meadows, on rocks; 800-2000 m. Anhui, Chongqing, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Zhejiang.

The leaf margins of Huperzia sutchueniana are toothed, and its leaf apex is acuminate.