Vegetation heterosporous; rhizomes long-creeping, slender, glabrous or hairy; leaves with 2 or four leaflets at the petiole suggestion or lacking a blade entirely, the venation of leaflets dichotomously branching; sori enclosed in stalked bean-formed sporocarps (highly modified leaves), these extremely intricate internally, Each individual containing each megasporangia and microsporan... https://ballonarch54218.vigilwiki.com/7095634/the_basic_principles_of_ballon_arch