Flora of North America species comparison

never tuberous.

erect or nearly erect, hispid.

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

blades broadly triangular to cordate in outline, 3-foliolate, 6-13 × 8-16 cm, leaflets lobed, margins toothed, ultimate segments elliptic to lance-elliptic or oblong, margins toothed, apex acute or obtuse.

pedicellate;

receptacle glabrous;

sepals 5, reflexed, 1.5-2 × 0.8-1.2 mm, densely pubescent;

petals 0-5, 1.1-1.8 × 0.2-0.7 mm.

receptacle hispid;

sepals reflexed 1-2 mm above base, 6-9 × 3-4 mm, sparsely hispid;

petals 5, abaxially yellow or purplish, adaxially yellow, 9-11 × 6-8 mm.

globose, 3-5 × 3-5 mm;

achenes 10-20 per head, 1.7-2 × 1.4-1.7 mm, faces papillose, each papilla crowned with hooked bristle, otherwise glabrous, margin smooth;

beak deltate with slender recurved tip, 0.4-0.6 mm.

ovoid to globose, 9-11 × 8-11 mm;

achenes 3.2-3.8 × 2-3 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate or subulate from triangular base, straight or tip weakly hooked, 1-1.8 mm.

and lower cauline leaf blades semicircular or reniform, 3-parted or -divided, 1.5-3.2 × 1-2.4 cm, again lobed, base cordate, margins dentate, apex rounded.