Flora of North America species comparison

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

erect or nearly erect, hispid.

circular to ovate or obovate, undivided, 0.8-2.6 × 0.6-1.4 cm, margins entire or serrulate, apex obtuse or rounded.

receptacle glabrous;

sepals spreading, 4-8 × 2-4 mm, glabrous;

petals yellow, 5-12 × 1-3 mm.

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.

depressed-hemispheric or -conic, 3-4 × 5 mm;

achenes 2-2.6 × 1-1.4 mm, glabrous;

beak persistent, lanceolate, straight, 0.8-1.2 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.

roots absent.

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.

= 16.