Flora of North America species comparison

petiolate;

petiole 1–5 cm;

blade simple, lanceolate to oblong, 5–15 × 0.5–3 cm, margins undulate, subentire to sinuate or shallowly lobed, lobe margins entire, base truncate to cuneate.

petiolate;

petiole 1–10 cm;

blade simple, elliptic to ovate, 10–25 × 3–15 cm, margins entire, base rounded or acute.

extra-axillary, unbranched, 3–5(–7)-flowered, 3–5 cm.

terminal, becoming leaf-opposed, much-branched, 10–50-flowered, 5–20 cm.

1–3 cm in flower, reflexed and 1–3 cm in fruit.

0.2–0.6 cm in flower, erect and 0.4–10 cm in fruit.

radially symmetric;

calyx not accrescent, unarmed or with sparse prickles, 5–10 mm, densely silvery-stellate-pubescent, lobes linear-lanceolate;

corolla pale to deep blue or violet, rarely white, pentagonal-stellate, 2–3(–3.5) cm diam., with abundant interpetalar tissue;

stamens equal;

anthers narrow and tapered, 6–9 mm, dehiscent by terminal pores;

ovary glabrous to densely stellate-pubescent.

radially symmetric;

calyx accrescent and subtending fruit, unarmed, 5–7 mm, densely pubescent, hairs stellate to echinoid, lobes broadly triangular;

corolla white, stellate, 1–2 cm diam., without interpetalar tissue;

stamens equal;

anthers oblong, 2.5–3.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary tomentose, hairs stellate or echinoid.

yellow to orange, drying brown or black, globose, 0.5–1.5 cm diam., glabrous, without sclerotic granules.

yellow to orange, globose, 1–2 cm diam., densely pubescent, without sclerotic granules.

yellowish, flattened, 3–5 × 2–4 mm, minutely pitted.

yellowish brown, flattened, 1.5–2 × 1–1.5 mm, minutely pitted.

= 24, 48, 72.

= 24.