| Description:
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Climbing fern to 1.5 m, without spines. Rhizome shortly creeping; rhizome scales dark brown, rigid, 4–6 cells wide at base, abruptly narrowing into a long jointed hair at apex. Stipe reddish or straw-coloured, 13.5–45(–65) cm long, channelled above. Lamina 3–4(–5 fide Ballard)-pinnate and pinnatifid, lanceolate-ovate or narrowly oblong in outline, 0.5–1.5(–4) m long, 18–38 cm wide. Pinnae alternate, spreading, lanceolate to ovate-lanceolate or triangular in outline; primary pinnules triangular to lanceolate; secondary and tertiary pinnules variable in outline but ultimate pinnule forked or flabellately or pinnately deeply cut; ultimate segments narrowly oblong, 1–3 x 0.5-0.75 mm, mostly 1-veined. Rhachis similar to stipe, flexuous. Sori elliptic to obovate in outline, about half as wide as segment; indusial flap about as long as lamina, edge of lamina and indusium entire. |