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 1–1.5 cm;

blade simple, elliptic, 10–30 × 2–15 cm, margins entire or coarsely pinnatifid with 1–3 lobes per side, lobe margins entire, base cuneate.

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

leaf-opposed or in branch fork, unbranched or forked, to 10-flowered, to 15 cm.

erect and 0.2–0.5 cm in flower and fruit.

1.5–2 cm in flower and 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 somewhat accrescent, unarmed, 3–4 mm, glabrous, lobes deltate;

corolla blue to deep purple, rotate-stellate, lobes acute at apex, 3–4 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers oblong, slightly tapered, 3–4 mm, dehiscent by terminal pores that sometimes open into longitudinal slits;

ovary glabrous.

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

bright orange to red, obovoid to ellipsoidal, 1.5–2 × 1–1.5 cm, glabrous, with sclerotic granules inconspicuous to absent.

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

reddish brown, flattened, 1.5–2 × 1.5–2 mm, finely reticulate.

= 24.

= 46.