Flora of North America species comparison

unarmed.

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

venation pinnate or palmate.

blade linear or very narrowly oblanceolate, margins entire.

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

terminal, solitary flowers;

bracts absent.

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.

bisexual, radially symmetric;

sepals not persistent in fruit, (3-)5(-8), green or with scarious margins, spurred, oblong to elliptic, lanceolate, or oblanceolate, 1.5-4 mm;

petals 0-5, distinct, white, plane, linear to very narrowly spatulate, long-clawed, 1-2.5 mm;

nectary present;

stamens 5-25;

filaments filiform;

staminodes absent between stamens and pistils;

pistils 10-400, simple;

ovule 1 per pistil;

style persistent.

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

achenes, aggregate, sessile, prismatic, exposed face forming plane outer surface, sides faceted or curved by compression against adjacent achenes;

sides not veined;

beak terminal, straight, 0.05-1.8 mm.

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

endosperm abundant;

embryo usually small.

=8.