Vegetation heterosporous; rhizomes prolonged-creeping, slender, glabrous or hairy; leaves with 2 or 4 leaflets within the petiole tip or lacking a blade altogether, the venation of leaflets dichotomously branching; sori enclosed in stalked bean-shaped sporocarps (highly modified leaves), these very complex internally, Every single made up of equally megasporangia and https://balloon-arch-frame86429.dgbloggers.com/37206930/balloon-arch-frame-an-overview