Flora of North America species comparison

petiolate;

petiole 1–3 cm;

blade simple, narrowly ovate to elliptic, 1.5–5(–7) × 0.5–3.5 cm, margins entire or sinuate, base cuneate to decurrent.

petiolate;

petioles 0.5–1.5 cm;

blade simple, ovate to elliptic, (1–)2–6.5 × (0.5–)1–3(–4.5) cm, margins entire or undulate, base rounded to truncate and usually oblique.

extra-axillary or leaf-opposed, unbranched or rarely forked, umbel-like, 3–7(–10)-flowered, 1–3(–4) cm, fruiting peduncles sharply reflexed from base.

extra-axillary, unbranched, 3–4-flowered, 3–4 cm.

0.5–1 cm in flower and fruit, reflexed downward in fruit.

0.4–1.5 cm in flower, erect and 1–2 cm in fruit.

radially symmetric;

calyx not accrescent, unarmed, 2–3.5 mm, sparsely pubescent, lobes deltate, appressed in fruit;

corolla white or purplish, with greenish, yellowish, or brown central star, stellate, 0.8–1.5 cm diam., with sparse interpetalar tissue;

stamens equal;

anthers ellipsoidal, 2–3 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

radially symmetric;

calyx not accrescent, unarmed, 8–10(–20) mm, densely stellate-pubescent, lobes long-triangular to linear-lanceolate;

corolla violet, pentagonal, 2.5–4(–5) cm diam., with abundant interpetalar tissue;

stamens equal or slightly unequal;

anthers narrow and tapered, 6–10 mm, dehiscent by terminal pores;

ovary glabrous.

dull purplish black, globose, 0.5–1 cm diam., glabrous, without sclerotic granules.

light green, sometimes with darker mottling, drying dark brown or reddish brown, globose, 1–1.5(–2) cm diam., glabrous, cracking open to expose seeds, without sclerotic granules.

pale yellow, flattened, 1–1.5 × 1–1.5 mm, minutely pitted.

dark brown, flattened, 2–3 mm diam., minutely pitted.

= 24.