Rhizome thick, stiff, climbing, densely scaly when young, later glabrescent; scales adpressed, brown, orbicular, peltate, clathrate, with a tuft of stiff long hairs at middle on abaxial side, easily caducous. Fronds clustered to distant, subsessile or with stipe; lamina simple, lanceolate, or loriform, widest at middle, herbaceous or thickly stiffly papery, green or yellow green, glabrous, margin entire or undulate; midrib prominent, veinlets anastomosing, distinct, free included veinlets ending in distinct ovate hydathodes adaxially. Sori orbicular, superficial, or slightly sunken, 1-3 irregular rows on each side of midrib; paraphyses peltate, clathrate.

One variable species: widely distributed from Indonesia and Malesia to E Himalaya, Indochina, and S China.

(Authors: Zhang Xianchun (张宪春); Hans P. Nooteboom)