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 1.5–6 cm;

blade simple, ovate, 8–23 × 7–13 cm, margins coarsely lobed with 3–4 lobes per side, lobe margins entire to coarsely lobed, base cordate.

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

extra-axillary or leaf-opposed, occasionally sessile, unbranched or forked, 6–15(–30)-flowered, 3.5–8 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.5–2 cm in flower, pendent and 2–3 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.

radially symmetric;

calyx accrescent and subtending fruit, sparsely to moderately armed, 7–15 mm, densely stellate-pubescent, lobes broadly deltate;

corolla white to pale purple, rotate-stellate, 2.5–4 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers narrow and tapered, 5.5–7 mm, dehiscent by terminal pores;

ovary moderately stellate-pubescent.

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

yellow, dark green mottled with white when young, globose, 3.5–4(–5) cm diam., glabrous, without sclerotic granules.

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

light brown, flattened, 2.5–3.5 × 2–2.5 mm, minutely pitted.

= 24.

= 24.