Sida rhombifolia

Upright subshrub 30–200 cm high; branchlets with dense, minute stellate hairs. Leaves ovate to obovate, or rhombic, 15–90 mm long, 5–30 mm wide, cuneate or rounded at base; margins serrate apically, entire basally; surfaces dark green, subglabrous above, pale below and densely stellate-hairy; stipules 3–6 mm long. Flowers solitary; pedicel not exceeding leaves; calyx basally 10-ribbed, divided to c. midway; lobes 2–2.5 mm long; petals spreading, truncate, c. 6 mm long; styles 9–11. Fruit transversely elliptic, 4.5–5.5 mm diam., ± smooth, sparsely puberulent, abruptly tapered to a raised central portion; mericarps 2.5 mm high, faintly reticulate on lateral wall, splitting widely in 2 at apex, each apex with 0.8 mm long awn. Flowers mostly summer or autumn but later if conditions are warm and moist.