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Rhizome 3-4 mm. diam., far-creeping, branched, densely to sparingly clad in dark brown hairs; stipites distributed to approximate. Stipes up to 20-50 cm. × 2-4 mm., pale brown to stramineous, except towards dark base, muriculate, clad in us. rather sparse hairs. Rhachis (and costae) rather stout, pale brown to stramineous, with dense or scattered hairs. Lamina tripinnate, broadly deltoid, 20-90 × 15-60 cm., pale to rather dark green, membr. to subcoriac.; pinnae subopp. to alt. Primary pinnae often arcuate, spreading, ovate-oblong to ovate-lanceolate, acute to acuminate, 18-50 × 10-25 cm. Secondary pinnae narrow ovate-oblong, acute, 5-10 × 2-5 cm. Tertiary pinnae oblong, obtuse, pinnatifid to pinnatisect or sts pinnate, 1 cm. × 5 mm. Segs oblong-obtuse, to narrow-oblong, 1-2 mm. long, sts bluntly toothed. Sori us. cop., up to 5 pairs per seg., near sinuses, hardly 1 mm. diam.
Stipe and rachis dark chestnut-brown below, yellow-brown or green at apex, bearing abundant glandular and non-glandular hairs; stipe 40–170 cm long, 3.5–10 mm diam. Lamina broadly ovate to broadly elliptic, 25–200 cm long, 28–140 cm wide, 4-or 5-pinnate at base, with dense fine colourless glandular and non-glandular hairs 0.1–0.8 mm long on undersurface. Primary pinnae in 10–30 pairs; longest 16–100 cm long, 11–50 cm wide. Longest secondary pinnae 7–35 cm long, 3.5–15 cm wide, decreasing markedly in size along primary pinnae. Longest tertiary pinnae 2–17 cm long, 1–6 cm wide, with winged midribs. Quaternary pinnae 5–35 mm long, 2–12 mm wide, often divided to midribs. Veins ending in apices of ultimate pinnules. Sori lacking paraphyses, protected by broad reflexed membranous flaps 0.5–1.2 mm wide. Spores pale, echinate, 33–36 × 20–23 µm. [See also Green (1994: 588).]
