Species of this Genus

Rhizome erect, stout, scales broad, thin, having marginal, mucilage-secreting hairs in the young condition, superficial hairs generally absent. Stipe scaly near the base, green above. Young fronds covered with mucilage, many deeply lobed pinnae present on the adult frond, apex not pointed pinna like. Pinnae swollen, elongate, basal pinnae abruptly reduced either to small leaflets or to aerophores, pinna surface not pustular when dried. Sorus indusiate, indusium firm, glabrous or having acicular or capitate hairs. Spores monolete, bilateral, pale, bearing many wings or spinulos.