南川石杉 nan chuan shi shan

Lycopodium nanchuanense Ching & H. S. Kung, Acta Phytotax. Sin. 18: 235. 1980; Huperzia hupehensis Ching.

Plants terrestrial. Stem erect or ascending, 8-11 cm, 1-1.5 mm in diam. at middle, together with leaves 0.7-1 cm wide, 3-5 times dichotomously branched, upper portion often with bulbils. Leaves dense, attached at right angles with stem to slightly angled upward, not lustrous, linear, not contracted toward base, widest at base, falcate, 4-6 mm, ca. 0.8 mm wide at base, thinly papery, both surfaces glabrous, midrib indistinct, base truncate, decurrent, sessile, margin entire, straight and not crispate, apex acuminate. Sporophylls homomorphic with trophophylls; sporangia visible on both sides of sporophylls, yellowish, reniform.

● Wet places in forests or on tree trunks; 1700-2100 m. Chongqing, N and NE Guizhou, W Hubei, NE Yunnan (Yongshan, Zhenxiong).

The geographical distribution and the type locality (Xuan’en, Hubei) of Huperzia hupehensis are close to Nanchuan, Chongqing. Morphologically, there are no critical differences between H. hupehensis and H. nanchuanensis; thus, H. hupehensis is treated as a synonym of H. nanchuanensis.

The leaves of Huperzia nanchuanensis are linear and falcate.