Rhizome creeping, up to 4 mm in diameter; hairs on rhizome c. 15 mm long. Fronds up to 20 x 0.48 m; rhachis matt pale brown' to greyish green, up to 3 mm in diameter, producing secondary rhachises up to 10 mm long at intervals of 70-200 mm each; aborted apical bud densely set with brown multicellular hairs 1.5 mm long; secondary and tertiary rhachises with narrowly winged, petiolate, non-articulate, lanceolate-oblong to lanceolate, pinnate to 2-pinnatifid; sterile pinnules up to 110 mm long, ultimate segments usually with prominent basal lobes, apices broadly acute, margins both coarsely crenate and with crenations finely crenate, veins set with hairs; fertile pinnules produced into numerous linear fertile lobes, each bearing up to 20 sporangia in 2 rows.
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