Flora of North America species comparison

petiolate;

petiole 1–8 cm;

blade simple, elliptic to ovate, 11–31 × 4–14 cm, margins entire, base acute, often with smaller axillary leaves.

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.

terminal, becoming leaf-opposed, much-branched, 50–100-flowered, 5–24 cm.

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

erect and 0.2–0.5 cm in flower and fruit.

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

radially symmetric;

calyx slightly accrescent, unarmed, 4–7.5 mm, densely pubescent, lobes deltate;

corolla purple, stellate-pentagonal, 1–1.5 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers oblong, 2–3.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary tomentose.

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.

yellow, globose, 1–1.5 cm diam., tomentose, without sclerotic granules.

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

yellowish brown, flattened, 1.5–2.5 × 1.5–2 mm, minutely pitted.

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

= 24.

= 24.