Flora of North America species comparison

always both filiform and tuberous on same stem.

not thickened basally, glabrous.

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

erect to prostrate, usually rooting nodally, glabrous or strigose.

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.

ovate to broadly ovate, 0.8-2.7 × 0.8-1.9 cm, base rounded to weakly cordate, margins entire or dentate, apex rounded or obtuse.

bracts lanceolate to oblanceolate or sometimes ovate.

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 glabrous;

sepals 5, spreading or reflexed from base, 1.5-3 × 1-2 mm, glabrous;

petals 5-6, 3-5 × 1-2 mm;

nectary scales glabrous.

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.

hemispheric or globose, 2-4 × 3-4 mm;

achenes 1.2-1.4 × 1-1.2 mm, glabrous;

beak lanceolate to lance-filiform, straight or curved, 0.4-1 mm.

= 32.