- Scientific Name: Huperzia serrata (Thunb.) Trevis.
- Ref: Atti Soc. Ital. Sci. Nat. 17(2):248. 1874
- Synonyms:
- Huperzia myriophyllifolia (Hayata) Holub
- H. selago var. serrata (Thunb.) Á.Löve & D.Löve
- H. serrata f. intermedia (Nakai) Ching
- H. serrata var. intermedia (Nakai) Satou
- H. serrata var. myriophyllifolia (Hayata) H.M.Chang
- H. serrata var. paucidentata (Sugim.) Satou
- Lycopodium sargassifolium Liebm.
- L. serratum Thunb.
- L. serratum var. intermedium Nakai
- L. serratum var. myriophyllifolium Hayata
- L. serratum var. thunbergii Makino
- Urostachys myriophyllifolius (Hayata) Herter
- U. serratus (Thunb.) Herter
- U. serratus var. japoniconeotropicus Herter ex Nessel
- U. serratus var. sachalinensis Nessel
- English Common Name: toothed clubmoss
- Chinese Common Name: 蛇足石杉 shézú shíshān, 蛇足石松 shézú shísōng
- Japanese Common Name: トウゲシバ [峠芝] tōgeshiba
- Family: Lycopodiaceae
- Genus: Huperzia
- Distribution: Forests, shrubs, roadsides; 300-2700 m. Throughout China except parts of N and NW China [Bhutan, Cambodia, India, Indonesia, Japan, Korea, Laos, Malaysia, Myanmar, Nepal, Philippines, Russia, Sri Lanka, Thailand, Vietnam; Australia, Central America, Pacific islands].
- Photo: Tianlong Canyon, Zhejiang
Plants terrestrial. Stem erect or ascending, 10-30 cm, 1.5-3.5 mm in diam. at middle, together with leaves 1.5-4 cm wide, 2-4 times dichotomously branched, upper portion often with bulbils. Leaves sparse, attached at right angles with stem, lustrous, narrowly elliptic, conspicuously contracted toward base, straight, 1-3 cm × 1-8 mm, thinly leathery, both surfaces glabrous, midrib conspicuously raised, base cuneate, decurrent, petiolate, margin straight and not crispate, irregularly toothed, apex acute or acuminate; teeth acute at apex, coarse or slightly small. Sporophylls homomorphic with trophophylls; sporangia visible on both sides of sporophylls, yellowish, reniform. (Flora of China)
