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 0.5–3 cm;

blade simple, ovate to elliptic, 3–8 × 1.5–4 cm, margins deeply lobed to pinnatifid with 3–4 lobes per side, these shallowly lobed, base obtuse.

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

extra-axillary, unbranched, 5–8-flowered, 8–12 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.4–1 cm in flower, 1–1.8 cm and erect 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, moderately prickly, 4–6 mm, moderately pubescent, lobes narrowly triangular;

corolla white, rotate-stellate, 2–2.5 cm diam., with abundant interpetalar tissue;

stamens unequal, lowermost much longer and curved;

anthers narrow and tapered, dehiscent by terminal pores, short anthers 5–6 mm, longer anther 9–11 mm;

ovary glabrous.

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

brown, globose, 1–1.2 cm diam., glabrous, dry, without sclerotic granules.

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

dark brown, flattened, reniform, ca. 1.5 × 1 mm, reticulately ridged.

= 24.