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 1.5–4 cm;

blade simple, ovate to elliptic, 5–25 × 3–15 cm, margins entire to shallowly lobed with 2–4 lobes per side, lobe margins entire to undulate, base obtuse to cordate.

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

extra-axillary, usually much-branched, 10–20-flowered, to 10 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.5–1 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, 5–8 mm, densely stellate-pubescent, lobes triangular;

corolla usually blue to purple, rarely whitish, stellate to rotate-stellate, 2.5–4 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers narrow and tapered, 6–8 mm, dehiscent by terminal pores;

ovary glabrous to stellate-pubescent.

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

yellow to orange, globose, 0.7–1.5 cm diam., stellate-pubescent at apex, without sclerotic granules.

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

yellow to light brown, flattened, 2.5–3 × 2–2.5 mm, minutely pitted.

= 24.