Flora of North America species comparison

always both filiform and tuberous on same stem.

erect or ascending, never rooting nodally, strigose or spreading-strigose, base not bulbous.

dimorphic, flowering stems erect or ascending, stolons prostrate, rooting nodally, glabrous or sparsely hirsute, not bulbous-based.

blades ovate to broadly ovate in outline, 3-5-foliolate, 2.1-4.7 × 1.9-4.5 cm, leaflets undivided or 1x-lobed or -parted, ultimate segments oblanceolate or obovate, margins entire or with few teeth, apex rounded-acute to rounded-obtuse.

simple and undivided, blades oblong to cordate or circular, 0.7-3.8 × 0.8-3.2 cm, base rounded to cordate, margins crenate or crenate-serrate, apex rounded.

receptacle hispid or glabrous;

sepals spreading or sometimes reflexed from base, 5-7 × 2-3 mm, hispid or glabrous;

petals 5(-7), yellow, 8-14 × 3-6 mm.

receptacle hispid or glabrous;

sepals spreading, 2.5-6 × 1.5-3 mm, glabrous;

petals 5, yellow, 2-7 × 1-3 mm.

globose or ovoid, 5-9 × 5-8 mm;

achenes 2-2.8 × 1.8-2.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, filiform, straight, 1.2-2.8 mm.

long-ovoid or cylindric, 6-12 × 4-5(-9) mm;

achenes 1-1.4(-2.2) × 0.8-1.2 mm, glabrous;

beak persistent, conic, straight, 0.1-0.2 mm.

roots absent.

= 32.

= 16.