Vegetation heterosporous; rhizomes extended-creeping, slender, glabrous or hairy; leaves with 2 or 4 leaflets in the petiole idea or lacking a blade completely, the venation of leaflets dichotomously branching; sori enclosed in stalked bean-shaped sporocarps (really modified leaves), these incredibly advanced internally, Every that contains both of those megasporangia and https://emilioxejos.wikiexcerpt.com/3830630/the_basic_principles_of_ballon_arch