Biennials or perennials; sparsely to densely pilose. Stems usually branched distally, rarely basally, (2.5–)4–10(–15) dm. Basal leaves: petiole (1–)2–10(–15) cm; blade lanceolate, 10–45 cm, margins coarsely dentate or pinnatifid, lateral lobes oblong or lanceolate, (terminal lobe deltate or lanceolate, larger than lateral lobes). Cauline leaves: (distalmost) blade lanceolate or sublinear. Fruiting pedicels divaricate, straight, 1–2(–2.3) cm. Flowers: sepals spreading, 2.5–4 × 1–1.5 mm; petals (4–)4.5–7(–8) × (2–)3–5 mm, claw (slender), 1–2 mm; filaments 1.5–3.5 mm; anthers 0.8–1 mm. Fruits ovoid, or, rarely, suboblong and slightly constricted at middle, terete, not winged, 1- or 2-loculed, (0.5–)0.6–0.7(–0.8) cm × 3–4(–5) mm, (gradually tapering to apex); style obsolete or, rarely, to 1 mm. Seeds 1 or 2 per fruit, 2–3.5 mm. 2n = 14.

Phenology: Flowering Jun–Aug.
Habitat: Roadsides, fields, pastures, meadows, disturbed areas, waste places

Distribution

• Generated Map
• Legacy Map

Introduced; B.C., N.B., N.S., Que., Mass., Mich., N.Y., Ohio, Pa., Europe, Asia.

Discussion

Selected References

None.

Lower Taxa

None.