Hypodematium Kunze

Plants on rocks. Rhizome short, densely covered with scales that are broadly basally attached, mixed with profuse, unicellular, papillate, glandular hairs with roots on the lower side, leaves close together, distichous, the base of the stipe swollen, arranged in two close lateral rows on each side of rhizome and densely covered by a cushion like mass of clear red-brown, lanceolate imbricate thin scales. Lamina more or less 5-sided deltoid, acuminate, decompound, 3-4 pinnate, basal pinnae the largest, deltoid, much produced on the basiscopic side; basal segments of the upper pinnae (nearly) opposite; venation free, pinnate; rhachises and veins bearing numerous hairs. Sori dorsal on the veinlets, rounded, indusium membranaceous, rounded or reniform, attached to the receptacle by its base, pilose and ciliate; receptacle large, prominent; sporangia often with some hairs; spores bilateral, opaque, globular, coarsely verrucose.