Annuals 10-15(-40) cm tall. Stems numerous, erect to decumbent. Stipules triangular-lanceolate, 2-6 mm. Leaves opposite or alternate; leaf blade triangular-lanceolate to oblong-lanceolate, 5-18 cm, pinnately divided to pinnately cleft, 5-12-lobed with basal ones more deeply incised, both surfaces appressed pilose. Pseudoumbels conspicuously longer than leaves, with (2 or)3-10 hermaphrodite flowers; peduncle with glandular and nonglandular trichomes. Pedicel 0.8-1.7 cm. Sepals ovate, 3-6 mm, glandular and hirsute, apex acute. Petals uniformly purple or 2 with a basal black spot, obovate, 5-12 mm. Mericarp 3-7 mm, with apical pit, with or without ridges or furrows; awn not plumose. Fl. Jun-Jul, fr. Jul-Oct. 2n = 20, 36, 40, 48, 54.
"Winter-annual or biennial; stems at first anthesis very short, with the lvs mostly basal, later diffusely branched, to 4 dm; lvs elongate-oblanceolate, the principal ones pinnately compound with several sessile, ovate or oblong, deeply and irregularly cleft pinnae each 1–2.5 cm; infls long-peduncled, 2–8-fld, the pedicels 1–2 mm; sep 5–7 mm, mucronate or shortly awned; pet off- pink, 5–8 mm; anther-bearing filaments without teeth; fr 2–4 cm; 2n mostly = 40 in ours. Native of the Mediterranean region, now established as a common weed throughout most of the U.S. Apr.–Sept."