8. Huperzia appressa (Desvaux) Á. Löve & D. Löve, Bot. Not. 114: 34. 1961.
伏贴石杉 fu tie shi shan
Lycopodium selago Linnaeus var. appressum Desvaux, Mém. Soc. Linn. Paris 6(2): 180. 1827; Huperzia selago (Linnaeus) Bernhardi ex Schrank & Martius subsp. appressa (Desvaux) D. Löve; H. selago var. appressa (Desvaux) Ching; L. appressum (Desvaux) Petrov (1930), not (Chapman) F. E. Lloyd & Underwood (1900); L. selago subsp. appressum (Desvaux) Hultén; Urostachys selago (Linnaeus) Herter f. angustius Christ ex Nessel ["angustinus"]; U. selago f. reductus Nessel; U. selago f. reductus-angustius Nessel ["reductus-angustinus"].
Plants terrestrial. Stem erect or ascending, 3-10 cm, 1-2 mm in diam. at middle, together with leaves 5-9 mm wide, 1 or 2 times dichotomously branched, upper portion often with bulbils. Leaves dense, angled upward or attached at right angles with stem, lustrous, lanceolate, base nearly as wide as middle, straight, 2-5 × 0.8-1.3 mm, leathery to papery, both surfaces glabrous, midrib indistinct abaxially, slightly distinct adaxially, base truncate, decurrent, sessile, margin straight and not crispate, entire, apex acute. Sporophylls homomorphic with trophophylls; sporangia not visible or visible on both sides of sporophylls, yellowish, reniform.
Alpine meadows, stone crevices; 2300-5000 m. Jilin, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan [Asia, Europe, N North America].
Huperzia appressa is often treated as a variety, subspecies, form, or synonym of H. selago. However, Ji et al.s (China J. Chin. Mat. Med. 32: 1971-1975. 2007) matK data show that H. appressa deserves to be treated at the specific rank.
The leaf margins of Huperzia appressa are involute, and the leaf apex is acuminate.
"Lycopodium selago f. reductum" and "L. selago f. angustius" (Christ, Boll. Soc. Bot. Ital. 1898: 184. 1898) belong here but are nomina nuda and were not therefore validly published (Melbourne Code, Art. 38.1(a)). These "formae" have sometimes been misinterpreted as a hyphenated forma: f. reductum-angustius.