Plants perennial, 1–2 m high. Root thick, short-conic. Stem stout, glabrous or pubescent. Leaves petiolate, petioles ca. 25 cm, sheaths inflated; blade triangular-ovate, up to 25 × 30 cm, 2-pinnate; pinnae petiolules ca. 6 cm; leaflets short-petiolulate, oblong, 4–7 × 1.5–3 cm, sometimes 3-lobed, margin serrate, pubescent along nerves abaxially or densely hispid on both sides. Bracts linear, ca. 1.5 cm, deciduous; rays ca. 50, ca. 4 cm; bracteoles several, linear, 2–4 mm; pedicels ca. 30. Calyx teeth obsolete. Petals white, oblong. Fruit ovoid, ca. 5 × 3.5 mm, base cordate; dorsal ribs filiform, lateral ribs broad-winged; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Sep–Nov.
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