Herbs, to 1 m, usually much shorter (quite variable). Stems suberect to decumbent, with patent or retrorse, simple hairs, hairs 1 mm. Leaves: petiole 1/2 times to equaling blade, hispid; blade concolorous, often with purple blotch along midvein, ovate, triangular, hastate, or sometimes palmately lobed, mostly 3–9 cm, membranous, base cordate, wide-rounded, or truncate, margins crenate to subentire, apex acute, surfaces sparsely hairy, hairs mostly simple, appressed, 1 mm. Inflorescences solitary flowers. Pedicels 4–12 cm, often exceeding leaf. Flowers: calyx 5–10 mm, accrescent to 12–20 mm, lobes without dark midrib, apex acute, hispid; petals purplish or lavender, rarely white, drying purplish, sometimes bluish, 8–26(–30) mm; staminal column hairy; style 10–19-branched; stigmas glabrous. Schizocarps 8–11 mm diam. (excluding spines), densely hispid; mericarps 10–19, with dorsal spur 1.5–4 mm. Seeds with or without enclosing endocarp. 2n = 30, 60, 90.
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An annual herb. It grows 80 cm high. The stem is ridged and branching and it can be creeping. The leaves are delta shaped with large teeth or lobes along the edge. The flowers are blue, purple and violet. They occur singly in the axils of leaves. They are 2-3 cm wide. The fruit is a bristly capsule It has 9-20 segments. There is one seed in each segment.
Herb, up to 0.8 m high, sparsely hirsute with long, mostly simple, spreading or retrorse hairs. Leaves deltoid to triangular-ovate or-lanceolate. Carpels 9-20, hispid, not reticulate on back. Flowers pink to purple.
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