Rhizome thick, creeping, or upper part ascending, densely clothed with blackish brown, linear-lanceolate scales. Fronds 47-86 cm; stipe stramineous, 24-60 cm, to 5 mm in diam., base with scales similar to those on rhizome, glabrescent upward; lamina 1-pinnate, turning gray when dried, glabrous but dull adaxially, ovate-oblong, 23-34 × 16-24 cm, papery, apex ending with a terminal pinna, rachis glabrescent; lateral pinnae 5-8 pairs, alternate or lowest pair opposite, obliquely spreading, stalked, linear-lanceolate, 8-17 × 1.4-2.8 cm, base narrowly cuneate to cuneate, apex acuminate to shortly caudate, margin with short coarse teeth, each tooth with 2-4 cartilaginous aristate tips; terminal pinna conform or sometimes slightly larger; veins pinnate, veinlets 2 or 3 pairs on each set of lateral veins, veinlets simple or forked, visible on both surfaces, bearing sparse brown or blackish hairlike scales abaxially. Sori in 2 or 3 rows on both sides of midvein of ultimate segment, for row next to midvein sori subterminal on veinlets, otherwise dorsal on middle or proximal part of veinlets; indusia brown, membranous, and fugacious.
Home