Flora of North America species comparison

never tuberous.

erect to reclining, not rooting nodally, hirsute or sometimes pilose or glabrous, base not bulbous.

glabrous.

laminate and filiform-dissected; laminate leaf blades reniform, 3-parted, 0.4-1.1 × 0.7-2.3 cm, segments obovate or fan-shaped, shallowly cleft, margins crenate;

filiform-dissected leaves with stipules gradually tapering upward, connate for their whole length.

broadly ovate to semicircular or reniform in outline, 3-parted or -foliolate, 1.5-5.3 × 2.2-8 cm, segments usually again 1(-2)×-lobed, ultimate segments oblong or elliptic to lanceolate or oblanceolate, margins dentate (sometimes dentate-lobulate or entire), apex acute to rounded-obtuse.

receptacle glabrous;

sepals reflexed 2-3 mm above base, 4-7(-9) × 2-4 mm, hirsute;

petals 5-14, yellow, 5-13 × 1.5-8 mm.

receptacle hispid, rarely glabrous;

sepals spreading or reflexed, 2-4 × 1-2 mm, glabrous;

petals 5, 4-7 × 1-5 mm;

style 0.1-0.8 mm.

usually recurved.

hemispheric, 3-7 × 5-9 mm;

achenes 2.6-3.6(-4.8) × 1.8-3(-3.2) mm, glabrous, rarely hispid, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate to lance-subulate, straight or curved, 0.4-2.2 mm.

hemispheric to ovoid, 2-4 × 2-5 mm;

achenes 1-2 × 0.8-1.4 mm, glabrous or hispid;

beak persistent, filiform, 0.1-1.2 mm.