Flora of North America species comparison

never tuberous.

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

erect from short caudices, not rooting nodally, glabrous, not bulbous-based.

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.

cordate in outline, ternately 1-2x-compound, 1.5-3.8 × 2.1-3.8 cm, leaflets 2-3x-parted, ultimate segments elliptic to linear, margins entire or with occasional teeth, apex obtuse to acuminate.

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 hispid;

sepals spreading, 9-15 × 5-9 mm, glabrous;

petals pinkish white, 12-18 × 9-13 mm.

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.

roots absent.

heads globose or depressed-globose, 13-27 × 21-29 mm;

fruit wall veined, inflated, not winged, fruits thus utricles;

utricles 6-12 × 4-6 mm, glabrous;

beak persistent, deltate or subulate from deltate base, 0.2-0.6 mm.

= 28.