Annuals 6-40 cm tall, canescent. Stems several to numerous, ascending. Stipules 1-3 mm, subulate. Leaves opposite; leaf blade ovate to triangular-ovate, 1-3 cm, pinnately cleft, pinnately parted, or rarely with basal pair distinct, abaxially velutinous, adaxially pubescent. Pseudoumbels with 3-5 hermaphrodite flowers; peduncle spreading pilose. Pedicel ± as long as to 1/2 as long as flowers. Sepals elliptic-ovate, 5-6 mm, densely pubescent, apex awned. Petals purple with a darker base, obovate, 4-5 mm. Mericarp 5-8 mm, without apical pit and ridges; awn plumose. Fl. Apr-May, fr. May-Jun. 2n = 18.
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