Perennial herb, with annual stems from a branched cylindrical woody rootstock; stems up to 45 cm high, sparsely branched, puberulous.Leaves usually reflexed on a petiole to 8 mm long; stipules glandular, minute; lamina to 5 × 0.8 cm, linear-lanceolate, obtuse at the apex, rounded at the base, minutely serrate with glandular teeth on the margins, pilose with long spreading hairs, midrib prominent on the lower surface.Cymes in axillary and terminal 3-branched umbels, with primary rays to 8 cm long, each forking once.Bracts similar to the leaves.Cyathia sessile, 3.5 × 5 mm, with puberulous funnel-shaped involucres; glands 4–5, 2.5 mm wide, transversely elliptic, minutely crenulate on the margin, spreading, reddish; lobes 1 mm long, subquadrate with a fringed ciliate margin.Male flowers: bracteoles fan-shaped, deeply laciniate, feathery; stamens 4 mm long.Female flower: ovary densely pubescent; styles 2.5 mm long, joined to halfway, with spreading thickened apices.Capsule exserted on a pilose pedicel 3.5 mm long, 6.5 × 7.5 mm, obtusely 3-lobed with a truncate base, sparsely pilose.Seeds 4.8 × 3.5 mm, ovoid, acutely triangular at the apex, obscurely 4-angled, surface obscurely and closely wrinkled, purplish-black.
