Flora of North America species comparison

not thickened basally, glabrous.

erect or ascending, rooting at most proximal nodes, glabrous.

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

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

ovate or lanceolate, 1.2-4.2 × 0.5-1.2 cm, base acute to truncate, margins entire or denticulate, apex acuminate to rounded.

bracts linear to lanceolate or oblanceolate.

receptacle glabrous;

sepals 4-5, spreading or reflexed from base, 1.5-3 × 1-1.5 mm, glabrous or sparsely hirsute;

petals 1-3, 1.5-2 × 0.5-1 mm;

nectary scales glabrous.

receptacle glabrous;

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

petals yellow, 5-12 × 1-3 mm.

hemispheric to cylindric, 2-8 × 2-3 mm;

achenes 1-1.2 × 0.6-0.8 mm, ± tuberculate, glabrous;

beak absent or nearly so, to 0.1 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.

roots absent.

= 16.