Flora of North America species comparison

never tuberous.

erect or nearly erect, hispid.

erect to decumbent, never rooting nodally, hirsute, pilose, or glabrous, base not bulbous.

blades ovate to narrowly ovate in outline, 3-parted or -foliolate, 3.3-9.5 ×3.5-9.4 cm, leaflets or segments 1-3x-lobed, ultimate segments ovate or oblong-ovate to lanceolate, 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 glabrous;

sepals reflexed 1-2 mm above base, 3-8 × 2-4 mm, hirsute;

petals 5-17, yellow, 6-12 × 3-6 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.

hemispheric to globose, 6-9 × 7-10 mm;

achenes 3.4-4.4 × 2.4-3.6 mm, glabrous or rarely hispid, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, deltate or lance-deltate, curved, 0.2-1.2 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.