Histiopteris (J.Agardh) J.Sm.

Plants terrestrial, climbing. Rhizome thick and long creeping, vascular system a corrugate solenostele, densely clothed with lanceolate, thick, castaneous-brown scales. Fronds sparse, large, indeterminate; stipe reddish castaneous, shiny, long, terete, glabrous; costae same as stipes in color, slightly grooved adaxially; lamina 2-or 3-pinnate, triangular, papery to subleathery, glabrous, basally usually pallid; pinnae opposite, often sessile; pinnules at base a pair, auricle-like; pinnules opposite; venation reticulate, without included veinlets. Sori along margin of lamina, with collecting vein near margin, protected by a narrowly linear false indusium formed by a membranous margin, paraphyses present, without velum; indusia long stalked and annulus composed of 18 thick-walled cells; spores dihedral, oblong to reniform, hyaline, with prominent wart. x = 12.