Prairie Buttercup

Stems decumbent, sparsely pilose. Basal and lower cauline leaf blades reniform, 3-parted, 0.8-1.7 × 1.2-2 cm, segment base cordate, margins dentate or lobulate, apex rounded-obtuse. Flowers sessile; receptacle glabrous or pilose; sepals 3, spreading, 1-2 × 0.5-1 mm, hirsute; petals 3, 1-2 × 0.5-0.8 mm. Heads of achenes hemispheric, 2-2.5 × 3-3.5 mm; achenes 10-15 per head, 1.3-1.7 × 1-1.3 mm, faces and proximal margin finely papillate, each papilla crowned with hooked bristle, otherwise glabrous; beak semicircular to deltate, curved, 0.2-0.5 mm.

introduced; Ala., Fla., Ga., La., Miss., N.C., Tex.; native to South America (s Brazil, Uruguay, and Argentina).

Flowering winter-spring (Feb-Apr).

Weed in disturbed areas, usually near coast; 0-200m.