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;

petioles 0.5–1.5 cm;

blade simple, ovate to elliptic, (1–)2–6.5 × (0.5–)1–3(–4.5) cm, margins entire or undulate, base rounded to truncate and usually oblique.

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

extra-axillary, unbranched, 3–4-flowered, 3–4 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.4–1.5 cm in flower, erect and 1–2 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, 8–10(–20) mm, densely stellate-pubescent, lobes long-triangular to linear-lanceolate;

corolla violet, pentagonal, 2.5–4(–5) cm diam., with abundant interpetalar tissue;

stamens equal or slightly unequal;

anthers narrow and tapered, 6–10 mm, dehiscent by terminal pores;

ovary glabrous.

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

light green, sometimes with darker mottling, drying dark brown or reddish brown, globose, 1–1.5(–2) cm diam., glabrous, cracking open to expose seeds, without sclerotic granules.

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

dark brown, flattened, 2–3 mm diam., minutely pitted.

= 24.