12. Lycopodium alpinum Linnaeus, Sp. Pl. 2: 1104. 1753.
高山扁枝石松 gao shan bian zhi shi song
Diphasiastrum alpinum (Linnaeus) Holub; D. alpinum var. planiramulosum (Takeda) Li & J. Z. Wang; Diphasium alpinum (Linnaeus) Rothmaler; Lepidotis alpina (Linnaeus) P. Beauvois; Lycopodium alpinum var. planiramulosum Takeda; Stachygynandrum alpinum (Linnaeus) C. Presl.
Plants small to medium-sized, terrestrial; aerial shoots creeping, 30-70 cm. Lateral branches suberect, 6-10 cm tall, dichotomously branched with well-differentiated lateral branchlets much branched, branchlets flattened, dorsiventral. Leaves spirally arranged, dense, scalelike, strongly adnate to branchlets making branchlets cordlike, 0.7-1.5 × ca. 0.8 mm, herbaceous, midrib indistinct, base adnate to branches, sessile, margin slightly involute, entire, apex acute. Strobili 2, terminal on short peduncle, pale yellow, terete, 1.1-2.5 cm; sporophylls broadly ovate, imbricate, ca. 2 × 1.2 mm, margin membranous, with irregular teeth, apex acute, caudate. Sporangia enclosed.
Alpine tundra regions, under small shrubs, mixed forests, on rocks; 1700-2400 m. Heilongjiang, Jilin [India, Japan, Korea, Mongolia, Russia (Siberia), Sri Lanka; Europe, North America].