Annuals; glabrous or pubescent. Stems unbranched or branched basally and distally, 1.5–7(–10) dm, (often white-hispid proximally and trichomes simple, glabrous distally). Basal leaves: petiole 1–4(–6) cm; blade lanceolate (in outline), lyrate to sinuate-pinnatifid, or runcinate-pinnatisect, (1–)3–15(–19) cm, lateral lobes oblong or lanceolate, (smaller than terminal lobe). Cauline leaves: (distalmost) blade lanceolate or sublinear. Fruiting pedicels divaricate, straight, 1.5–2.5(–3) cm. Flowers: sepals ascending to spreading, 3–4 × 1–1.5 mm; petals (8–)10–13 × 4.5–6 mm, claw minute or absent; filaments 3.5–6 mm; anthers 1–1.3 mm. Fruits oblong to subglobose, subquadrangular, with 4 irregularly dentate wings, 4-loculed, (0.8–)0.9–1.3(–1.4) cm × 5–6.5 mm; style 3.5–5(–6) mm. Seeds 3 or 4 per fruit, 2–3.5 mm. 2n = 14.
Phenology: Flowering Apr–Jun.
Habitat: Roadsides, fields, pastures, disturbed areas, waste places
Distribution
Pa., Va., s Europe, sw Asia, n Africa.
Discussion
Selected References
None.