clubmoss
/ˈklʌbmɒs/noun
1- a low-growing green plant that resembles a large moss, having branching stems with undivided leaves. Relatives of the clubmosses were the first plants to colonize the land during the Silurian period.石松。
1.1
- Class Lycopsida, division Pteridophyta: three living families, in particular Lycopodiaceae and Selaginellaceae (the lesser clubmosses).石松纲, 蕨类植物门：现存3科, 尤指石松科和卷柏科（小石松）。