Flora of North America species comparison

glabrous.

erect or nearly erect, hispid.

laminate and filiform-dissected; laminate leaf blades reniform, 3-parted, 0.4-1.1 × 0.7-2.3 cm, segments obovate or fan-shaped, shallowly cleft, margins crenate;

filiform-dissected leaves with stipules gradually tapering upward, connate for their whole length.

receptacle hispid, rarely glabrous;

sepals spreading or reflexed, 2-4 × 1-2 mm, glabrous;

petals 5, 4-7 × 1-5 mm;

style 0.1-0.8 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.

usually recurved.

hemispheric to ovoid, 2-4 × 2-5 mm;

achenes 1-2 × 0.8-1.4 mm, glabrous or hispid;

beak persistent, filiform, 0.1-1.2 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.

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.