Sinuous, wiry, glabrous perennial or biennial herb up to 45 cm., with a large elongate or subglobular taproot. Stems terete, with few grooves. Basal leaves with petioles up to 5 cm., with large membranous sheathing bases. Lamina emarginate to cordate at the base, apex rounded, margin dentate to denticulate. Stem leaves much reduced to prominently toothed appendages, the uppermost to sheathing bases alone. Umbels terminal and lateral; rays 3–7, 1·5–7 cm. long, relatively robust; bracts and bracteoles 0; partial umbels with 5–7 flowers with pedicels 5–15 mm. long. Calyx teeth obsolete; petals distinctly yellow, with incurved apices. Fruit 3 × 1·5 mm., ovoid, somewhat laterally compressed, ribs filiform. Stylopodium low-conical; styles 1 mm. long, only slightly clubbed at the apex, slightly divergent and becoming reflexed with maturity. Carpophore probably 2-cleft (other structural details of fruit not known in mature state).