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 0.5–2 cm;

blade simple, elliptic to elliptic-ovoid, 1–4.5 × 0.5–2.5 cm, margins entire, base rounded to obtuse and often decurrent.

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

nearly sessile, extra-axillary or subopposite leaves, unbranched, racemelike, 1–5-flowered.

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

0.5–1.2 cm in flower, 1–2 mm and spreading or nodding 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 not accrescent, unarmed, 3–9 mm, moderately to densely pubescent, lobes linear-lanceolate;

corolla white, rotate, 0.5–1 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers oblong, slightly tapered, 1.5–3 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

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

white to greenish and semitransparent, globose, 5–12 mm diam., glabrous, without sclerotic granules.

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

light brown, somewhat flattened, ca. 2.5 × 1.5 mm, notched where connected to placenta, ridged.

= 24, 48, 72.