Crops heterosporous; rhizomes extended-creeping, slender, glabrous or hairy; leaves with 2 or four leaflets for the petiole tip or lacking a blade altogether, the venation of leaflets dichotomously branching; sori enclosed in stalked bean-shaped sporocarps (really modified leaves), these extremely intricate internally, Each individual containing both of those megasporangia and https://balloon-arch-frame75420.laowaiblog.com/35589987/balloon-arch-frame-an-overview