Flora of North America species comparison

petiolate;

petiole 1–3 cm;

blade simple, narrowly ovate to elliptic, 1.5–5(–7) × 0.5–3.5 cm, margins entire or sinuate, base cuneate to decurrent.

petiolate;

petiole 2.5–6.5 cm;

blade simple to compound, broadly ovate, 5–13 × 2.5–9 cm, margins 2–3-times lobed or divided with 4–5 main leaflets per side, leaflets with deep, acute lobes, base truncate.

extra-axillary or leaf-opposed, unbranched or rarely forked, umbel-like, 3–7(–10)-flowered, 1–3(–4) cm, fruiting peduncles sharply reflexed from base.

extra-axillary, unbranched, 6–10-flowered, 3–8 cm.

0.5–1 cm in flower and fruit, reflexed downward in fruit.

0.5–1.5 cm in flower, erect and 0.5–1.5 cm in fruit.

radially symmetric;

calyx not accrescent, unarmed, 2–3.5 mm, sparsely pubescent, lobes deltate, appressed in fruit;

corolla white or purplish, with greenish, yellowish, or brown central star, stellate, 0.8–1.5 cm diam., with sparse interpetalar tissue;

stamens equal;

anthers ellipsoidal, 2–3 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

bilaterally symmetric;

calyx accrescent and tightly covering fruit, densely prickly, 3.5–4.5 mm, sparsely to moderately glandular-pubescent, lobes linear-lanceolate;

corolla yellow, stellate, 1.3–1.8 cm diam., with ovate or narrowly deltate lobes, with sparse interpetalar tissue;

stamens unequal, lowermost longer and curved, adjacent pair somewhat shorter, uppermost pair shortest;

anthers narrow and tapered, dehiscent by terminal pores, shortest anthers 4.5–6 mm, medium-sized anthers 5.6–7.5 mm, longest anther 6.5–8.6 mm;

ovary glabrous.

dull purplish black, globose, 0.5–1 cm diam., glabrous, without sclerotic granules.

brown, globose, 1–1.4 cm diam., glabrous, dry, without sclerotic granules.

pale yellow, flattened, 1–1.5 × 1–1.5 mm, minutely pitted.

dark brown, plump, 3–3.5 × 2.5–3 mm, radially ridged with hilum sunken in a deep notch.

= 24.

= 24.