Flora of North America species comparison

never tuberous.

never tuberous.

erect or ascending, never rooting nodally, crisped-pilose, base not bulbous.

erect, never rooting nodally, hispid, base not bulbous.

broadly rhombic to semicircular in outline, 3-parted, 2.8-4.3 × 3-5.5 cm, segments 3-lobed, ultimate segments lanceolate, margins entire or toothed, apex narrowly acute or acuminate.

broadly cordate in outline, 3-foliolate, 1.6-7 × 3-9 cm, leaflets cleft, usually deeply so, ultimate segments narrowly elliptic, margins toothed, apex acute.

receptacle glabrous;

sepals reflexed 1 mm above base, 4-6 × 1.5-3 mm, densely pilose;

petals 5, abaxially red, adaxially yellow, 10-12 × 4-6 mm.

receptacle hirsute;

sepals reflexed ca. 1 mm above base, 3-5 × 1.5-2 mm, ± hispid;

petals 5, yellow, 2-4 × 1-2.5 mm.

of achenes hemispheric, 4-7 × 7-10 mm;

achenes 3.4-4.2 × 2.8-3.2 mm, sometimes basally pilose, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lance-subulate, straight or somewhat curved distally, 1.6-2.6 mm.

of achenes cylindric, 9-12 × 5-7 mm;

achenes 1.8-2.8 × 1.6-2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, broadly lanceolate or nearly deltate, straight or nearly so, 0.6-0.8 mm.

= 16.