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Leaves with a petiole to 2.5 cm long; glandular stipules purplish; lamina to 11.5 × 3 cm, acute at the apex, cuneate at the base, subentire to serrate with minute gland-tipped teeth at the margin, midrib prominent on the lower surface.
Cyathia sessile, 2.5 × 4 mm with cup-shaped involucres, pilose; glands 4, 1 × 1.5 mm, transversely elliptic, green becoming reddish-brown; lobes 0.7 mm in diameter, rounded, ciliate.
Capsule barely exserted on a pilose pedicel c. 2 mm long, 4 × 5 mm, subglobose with truncate base, pilose with long spreading hairs.
Seeds 3 × 2 mm, conical with an acute apex, 4-angled, surface with irregular warts in 3–4 horizontal ridges, brownish-black.
Cymes axillary and in 3-branched umbels forking up to 15 times and spreading horizontally, with primary rays to 12 cm long.
Annual herb to 1 m high, stem often woody at the base, the whole plant sparsely covered with long spreading white hairs.
Female flower: ovary densely hairy; styles 1 mm long, joined at the base, spreading, with thickened grooved apices.
Male flowers: bracteoles fan-shaped, feathery; stamens 2.5 mm long.
Bracts subsessile, leaf-like, usually reflexed.
