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, 3–7.5 × 3–6 cm, margins entire to sinuate-dentate, base truncate to cordate.

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

leaf-opposed or occasionally extra-axillary, unbranched, umbel-like, 2–5(–7)-flowered, 0.5–1.5 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.5–1 cm in flower and fruit, spreading in flower, reflexed 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 nearly covering berry, unarmed, 2–3 mm, sparsely to moderately pubescent, lobes narrowly triangular;

corolla white with yellowish or greenish central star, rotate-stellate, 0.5–1 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers ellipsoidal, 1.2–2 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

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

dull pale green, globose, 0.5–1 cm diam., glabrous, with 4–6 sclerotic granules.

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

pale yellow, flattened, 1.5–2 × 1–1.5 mm, nearly smooth.

= 24.

= 24.