Flora of North America species comparison

petiolate;

petiole 1–4 cm;

blade simple, ovate to ovate-elliptic, 2–10.5 × 1–4.5 cm, margins entire or shallowly sinuate-dentate, base decurrent.

petiolate;

petiole 1–2.5(–4) cm;

blade simple, elliptic to obovate, 3–11(–14) × 1.6–5.5(–9) cm, margins entire or slightly undulate, occasionally with 2 small lobes at base, lobe margins entire, base truncate or acute.

extra-axillary or leaf-opposed, unbranched, usually umbel-like, 3–10-flowered, 0.5–3 cm.

terminal or lateral, leaf-opposed or extra-axillary, usually once-branched, occasionally more, 20–30-flowered, (2–)4–10 cm.

erect or spreading, 0.3–1 cm in flower, to 1.5 cm in fruit.

inserted into small sleeve on inflorescence axis, 1.5–2 cm in flower and fruit.

radially symmetric;

calyx somewhat accrescent, unarmed, 1–3 mm, lobes deltate, strongly reflexed in fruit;

corolla white, sometimes with yellowish central star, stellate, 0.4–0.8 cm diam., without interpetalar tissue;

stamens equal;

anthers ellipsoidal, 0.7–1.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

radially symmetric;

calyx not accrescent, unarmed, 6–7 mm, densely pubescent, lobes deltate;

corolla violet to purple with or without green spots at base of lobes, spots usually small and not confluent, rotate, 3–4.5 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers ellipsoidal, 4.5–5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

shiny purplish black, globose, 0.5–1 cm diam., glabrous, with (0–)2–4(–6) sclerotic granules, usually 2–4 larger and 2 smaller.

shiny green, turning yellow then black, globose, 3–4 cm diam., glabrous, without sclerotic granules.

pale yellow to brown, 1–1.5 × 0.5–1.5 mm, minutely pitted.

reddish brown, plump to flattened, 1.5–2 × 1–1.5 mm, minutely pitted.

= 24.