or epiphytic fern. Rhizome thick, wide creeping or climbing, long, sparsely
scaly, scales lanceolate, clathrate, dark brown, the cell wall forming a clear
network. Stipe short or long, attached to the rhizome, slightly winged,
gradually increasing to the base of the frond. Frond simple, usually broadly
lanceolate, widest in the middle, acuminate towards the base, mar gin entire,
base wing less. Veins distinct, with included branched veinlets. Sorus oblong or
round, interupted, borne in one row between the lateral veins.