Flora of North America species comparison

glabrous.

erect or ascending, sparsely pilose.

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 sparsely hispid;

sepals 5, spreading, 4-7 × 1-2 mm, strigose;

petals 5, 5-8 × 2-4 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.

discoid, 8-9 mm across;

achenes 5-8 per head, 4-6.4 × 2.8-4.4 mm, faces and margin covered with long spines, glabrous;

beak lance-subulate, straight, 1.6-3.8 mm.

and lower cauline leaf blades obovate to rhombic in outline, 3-parted or 3(-5)-foliolate, 1.8-5.2 × 1.6-4.2 cm, leaflets oblanceolate or divided into oblanceolate or linear segments, leaflet base narrowly acuminate, margins entire or distally dentate, apex rounded or acuminate.