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 1–3.5 cm;

blade simple, ovate-lanceolate, 3–10 × 2–5 cm, margins entire to sinuate-dentate, base cuneate to truncate.

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

extra-axillary, forked, umbel-like or racemelike, 6–14-flowered, 1.5–3 cm.

erect and 0.2–0.5 cm in flower and fruit.

straight and spreading and 0.5–1 cm in flower, strongly reflexed and 0.5–1 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 not accrescent, unarmed, 3–4 mm, sparsely pubescent, lobes obtuse;

corolla white to pale purple with yellowish or greenish central star, stellate, 1–2 cm diam., with sparse interpetalar tissue;

stamens equal;

anthers ellipsoidal, 2.5–3.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

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

dull green to purple, globose, 0.5–0.9 cm diam., glabrous, with 6–14 sclerotic granules per fruit.

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

pale yellow to light brown, flattened, 1.5–2 × 1–1.5 mm, finely reticulate.

= 24.

= 72.