Flora of North America species comparison

not thickened basally, glabrous.

erect or nearly erect, hispid.

erect or ascending, often rooting at proximal nodes, glabrous or sparsely pilose.

ovate to lanceolate or narrowly elliptic, 1.5-5.7 × 0.4-2.4 cm, base cordate to acute, margins finely denticulate or entire, apex broadly rounded to acuminate.

bracts linear to lanceolate or oblanceolate.

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 4-5, spreading or reflexed from base, 2-3 × 1.5-3 mm, glabrous or pubescent;

petals 4-6, 2-6 × 1-2 mm;

nectary scales glabrous.

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 ovoid, 2-4 × 2-3 mm;

achenes 0.8-1 × 0.8 mm, glabrous;

beak deciduous, leaving stump 0.1-0.2 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.