Flora of North America species comparison

unarmed.

5-30(-35) cm, from rhizomes, rhizomes horizontal.

blade undivided or more commonly divided or compound, base cordate, sometimes truncate or cuneate, margins entire, toothed, or incised;

venation pinnate or palmate.

0-1, ternate;

petiole 4-20 cm;

terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-5(-6) × 0.7-2.5(-3.5) cm, base narrowly cuneate, margins sharply serrate on distal 1/2(-2/3), apex acuminate to acute, surfaces strigose to nearly glabrous;

lateral leaflets unlobed or 1x-lobed; ultimate lobes 0.4-10 mm wide.

1-flowered;

peduncle proximally glabrous, distally villous to pilose;

involucral bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct;

terminal leaflet sessile to petiolulate, oblanceolate to rhombic, oblong, or ovate, 1-8 × 0.8-3(-3.5) cm, bases narrowly cuneate to cuneate, margins crenate to serrate on distal 1/2(-2/3), apex acuminate to acute, surfaces abaxially glabrous or strigose, adaxially nearly glabrous to strigose;

lateral leaflets unlobed or 1x-lobed; ultimate lobes 0.5-10 mm wide.

terminal or axillary, racemes, cymes, umbels, panicles, or spikes, or flowers solitary, flowers pedicellate or sessile.

sepals 5-7(-8), blue to purple, reddish, or purple to pink (rarely nearly white or abaxially reddish, violet, or marginally purple, adaxially white), ovate, oblong, or elliptic, 10-20 × 5-8(-10) mm, glabrous;

stamens 30-75.

bisexual, sometimes unisexual, inconspicuous or showy, radially or bilaterally symmetric;

sepaloid bracteoles absent;

perianth hypogynous;

sepals usually imbricate, 3-6(-20), distinct, often petaloid and colored, occasionally spurred;

petals 0-26, distinct (connate in Consolida), plane, cup-shaped, funnel-shaped, or spurred, conspicuous or greatly reduced;

nectary usually present, rarely absent;

stamens 5-many, distinct;

anthers dehiscing longitudinally;

staminodes absent (except in Aquilegia and Clematis);

pistils 1-many;

styles present or absent, often persistent in fruit as beak.

achenes, follicles, or rarely utricles, capsules, or berries, often aggregated into globose to cylindric heads.

body oblong to ellipsoid, 4-5 × 1.5-2 mm, not winged, puberulous to pilose, rarely glabrous;

beak ±straight, (0.5-)1-1.5 mm, glabrous.

nearly spheric;

pedicel (1.5-)2-5(-7) cm.

1-many per ovary, never stalked, not arillate;

endosperm abundant;

embryo usually small.