Herbs ca. 75 cm high. Rhizome long, creeping. Stem ribbed, setulose above. Basal and middle leaves petiolate, petioles 12–15 cm, sheaths ovate, pubescent; blade broad-triangular, 12–20 × 16–28 cm, 2-ternate-pinnate; leaflets subsessile, obliquely triangular-ovate, ca. 5 × 2.5 cm, base truncate, margin incised-serrate, teeth white-mucronulate, sparsely setulose on nerves abaxially. Upper leaves reduced, sheaths broad-inflated. Bracts few, linear-lanceolate; rays 15–40, 2–4 cm, setulose, unequal; bracteoles several, short-linear to lanceolate, reflexed. Petals white, obcordate, ca. 2 × 2 mm, 1-nerved. Fruit suborbicular or ellipsoid, 5–6 × 4–5.5 mm; dorsal ribs prominent, lateral ribs thin-winged, wings wider or as wide as the body; vittae 1 in each furrow 2 on commissure. n = 11*.
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