Annual herb; stems up to c. 60 cm long, armed with 4-rayed stalked glochids and sessile 4–8-rayed stellate hairs. Leaves opposite; blade ovate to orbicular in outline, 2–7 x 3–8 cm, rather shallowly 3-lobed, sparsely strigulose above with simple and forked hairs, with sessile or stalked stellate hairs and often a few glochids below; petioles up to 10 cm long, with glochids and stellate hairs. Umbels subcapitate, 1–5-flowered, on up to 4 cm long peduncles; involucre lacking. Petals white, stellate pubescent outside. Fruits sessile or subsessile, 5–8 mm long and wide, slightly cordate at the base, the lateral ribs extended into a prominent glochidiate-dentate wing, the wings of the 2 mericarps closely appressed, glabrous or sparsely stellate-pubescent on both surfaces; styles c. 0.5 mm long, longer than the stylopodium.