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 0.4–4 cm;

blade simple, ovate, lanceolate, or elliptic, 2–15 × 2–10 cm, margins subentire, sinuate, or lobed with 1–4 lobes per side, sometimes very deeply lobed almost to midrib, lobe margins entire to coarsely lobed, base cuneate.

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

extra-axillary, unbranched or rarely forked, 2–12-flowered, 2–9 cm.

erect and 0.2–0.5 cm in flower and fruit.

0.5–1 cm in flower, 1.2–1.8 cm and curved downward 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 somewhat accrescent, unarmed or with sparse prickles, 5–8 mm, moderately stellate-pubescent, lobes lanceolate to elliptic-acuminate;

corolla white to pale blue or violet, stellate to stellate-pentagonal or rotate-stellate, 2–3 cm diam., with interpetalar tissue at margins and bases of lobes;

stamens equal;

anthers narrow and tapered, 4.5–6.5 mm, dehiscent by terminal pores;

ovary glabrous or sparsely to moderately glandular-puberulent, rarely moderately pubescent, hairs white, stellate or simple.

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

light green with darker green mottling or pale greenish white, turning bright yellow, subglobose to depressed-globose, 1–2 × 1–1.8 cm, glabrous, without sclerotic granules.

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

yellow, flattened, 1.7–2.4 × 1.6–1.8 mm, minutely pitted.

= 24.

= 24.