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, with pair of entire lunate pseudostipules at base;

blade compound, elliptic to ovate, 7.5–20 × 3.5–8 cm, margins divided with 1–4 pairs of leaflets, these sometimes interspersed with smaller, interjected leaflets, lowermost leaflets sometimes greatly reduced in size, leaflet margins entire, base cuneate to cordate.

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

terminal, extra-axillary or leaf-opposed, generally forked or 3-fid, 3–26-flowered, to 10 cm.

erect and 0.2–0.5 cm in flower and fruit.

articulated near middle, 1.1–3.7 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 not accrescent, unarmed, 4–8 mm, lobes deltate-acuminate;

corolla purple, blue, pale pink, or rarely white, pentagonal to rotate, 1.8–3.3 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers oblong, slightly tapered, 3.5–6.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

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

green, sometimes with dark green stripes or white spots, globose or slightly ovoid, 0.9–1.7 cm diam., glabrous, without sclerotic granules.

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

greenish white, rounded, 1–2 mm diam., rugose.

= 24.

= 48.