Vegetation heterosporous; rhizomes prolonged-creeping, slender, glabrous or hairy; leaves with two or 4 leaflets with the petiole idea or lacking a blade entirely, the venation of leaflets dichotomously branching; sori enclosed in stalked bean-formed sporocarps (highly modified leaves), these quite advanced internally, Every made up of equally megasporangia and microsporangia; https://ballonarch00875.wikidank.com/1644751/fascination_about_ballon_arch