V The Filmy Fern Family Hymenophyllàceæ
The filmy ferns are small, delicate plants with membranaceous, finely dissected fronds from slender, creeping rootstocks. Sporangia sessile on a bristle-like receptacle. There are about one hundred species, mostly tropical, only one of which grows as far north as Kentucky.
FILMY FERN. BRISTLE FERN