Indusium absent. Sori marginal, borne on the vein-tips, ± confluent. Stipes and rhachises black or dark red-brown Adiantaceae
False indusium covering and bearing the sorus, consisting of a sharply reflexed, flap formed by the lamina(Fig. 17). Rhachises and stipes black or dark brown Adiantum
Inudium false or absent. Sori not borne on a flap formed by the lamina