Flora of North America species comparison

never tuberous.

never tuberous.

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

erect from short caudex or rhizome, never rooting nodally, hispid, strigose, or glabrous, base not bulbous.

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.

pentagonal in outline, deeply 3-5-parted, 1.8-5.2 × 2.7-9.8 cm, segments 1-2x-lobed or -parted, ultimate segments narrowly elliptic or oblong to lanceolate, margins toothed or lobulate, apex acute to rounded.

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 glabrous;

sepals spreading, 4-6(-9) × 2-5 mm, hispid;

petals 5, yellow, 8-11(-17) × 7-13 mm.

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.

globose, 5-7(-10) mm wide;

achenes 2-3 × 1.8-2.4 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, deltate, usually with tip short or long, straight or curved, subulate, 0.2-1 mm.

= 14.