filmy fern
noun
1- a small fern of damp shady places, with wiry creeping stems and delicate forked fronds which are only one cell thick. They occur chiefly in tropical and subtropical regions.膜蕨。
1.1
- Family Hymenophyllaceae: Hymenophyllum and other genera.膜蕨科：膜蕨属及其他属。