Flora of North America species comparison

never tuberous.

not thickened basally, glabrous.

erect, never rooting nodally, hispid or glabrous, base not bulbous.

erect or ascending, often rooting at proximal nodes, glabrous or sparsely pilose.

cordate to reniform in outline, 3-parted or sometimes 3-foliolate, 1.8-5.6 × 2.8-8.3 cm, segments again lobed, ultimate segments elliptic to lanceolate, margins toothed or crenate-toothed, apex acute to rounded-obtuse.

ovate to lanceolate or narrowly elliptic, 1.5-5.7 × 0.4-2.4 cm, base cordate to acute, margins finely denticulate or entire, apex broadly rounded to acuminate.

bracts linear to lanceolate or oblanceolate.

receptacle glabrous;

sepals reflexed or sometimes spreading, 2-3.5 × 1-2 mm, pubescent;

petals 5, yellow, 2-4(-6) × 1-2(-3) mm.

receptacle glabrous;

sepals 4-5, spreading or reflexed from base, 2-3 × 1.5-3 mm, glabrous or pubescent;

petals 4-6, 2-6 × 1-2 mm;

nectary scales glabrous.

globose or hemispheric, 4-7 × 4-7 mm;

achenes 2-2.8 × 1.6-2 mm, glabrous or sparsely hispid, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate, curved, hooked, 1.2-2.5 mm.

hemispheric to ovoid, 2-4 × 2-3 mm;

achenes 0.8-1 × 0.8 mm, glabrous;

beak deciduous, leaving stump 0.1-0.2 mm.

= 28.