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Erect annual or perhaps perennial herb, 0·5–1·75 m. tall, woody at the base, branched throughout but not much branched at the base, densely and shortly tomentose-subvelutinous with a whitish, yellowish, greenish-white, greyish-yellow or pale greyish-green indumentum on the younger parts of the stems, stipules, petioles, pedicels and outside of calyx; stems terete, wiry, purplish-grey to brownish, longitudinally fissured, ultimately glabrous.
Calyx (6) 8–11 mm. long, cupuliform, glabrous inside except for a narrow marginal tomentose zone, divided to about the middle; lobes triangular to ovate-triangular, acute to ± acuminate, sometimes distinctly 3-nerved but more usually with only the raised median nerve conspicuous.
Mericarps (7) 8–10, c. 6 mm. long, brown, muticous, rounded or minutely apiculate but not awned at the apex, usually stellate-pubescent at least in the upper part, dorsally finely rugose, laterally conspicuously reticulate with usually yellowish slightly raised ridges.
Flowers white to pale yellow (occasionally golden), solitary, axillary; pedicels 1·5–5 (7) cm. long, usually slender, terete, articulated at or above the middle.
Petals (14) 18–22 mm. long, with the narrow base ± fimbriate, glabrous or finely pubescent inside (mainly towards apex).
Seeds ovoid, brown, glabrous except for the often tomentose or velutinous area around the hilum.
Staminal tube glabrous or with sparse rather coarsely stellate hairs.