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Leaves glabrous, petiolate; laminae (3)5–12 cm. long, ovate-acute to-acuminate, the margins distinctly serrate; petioles 1·5–10 cm. long; stipules c. 1 cm. long, linear to lanceolate, membranous, deciduous.
Male flowers: tepals 2 + 2, white or palest pink; outer pair 13–26 × 10–18 mm., elliptic to suborbicular, inner pair 11–20 × 6–10 mm., elliptic; filaments c. 1·5 mm. long.
Flowers in terminal and axillary dichasial cymes with 1–2 dichasia; peduncles 5–9 cm. long; primary dichasial branches 0·5–3 cm. long.
Capsule 11–18 × 5–9 mm., ellipsoid, the wings triangular, unequal: the largest 7–13 mm. wide, the next 4–10 mm., the third 2–4 mm.
Stem glabrous, sparingly branched, arising from a tuber.
Bracts 5–9 × 2–5 mm., ovate, membranous.
Plants perennial, 30–90 cm. tall.
