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 2–7 cm;

blade simple to compound, broadly ovate, 4–10(–15) × 3–8 cm, margins bipinnately lobed or divided with 3–4 main leaflets per side, these with obtuse or rounded lobes, base truncate.

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

extra-axillary, unbranched, 4–10-flowered, 3–11 cm.

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

1–2 cm in flower, 1–2 cm and erect in 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.

bilaterally symmetric;

calyx accrescent and tightly covering fruit, densely prickly, 2.5–3.8 mm, densely glandular-pubescent, lobes linear-lanceolate;

corolla violet or blue, pentagonal-stellate, 2.5–3.5 cm diam., with interpetalar tissue at margins and bases of lobes;

stamens unequal, lowermost much longer and curved;

anthers narrow and tapered, dehiscent by terminal pores, short anthers yellow, 6–10 mm, longer anther purplish, 11–16 mm;

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.

brown, globose, 0.8–1.2 cm diam., glabrous, dry, without sclerotic granules.

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

dark brown, flattened, 2.3–3 × 2–2.5 mm, reticulately wrinkled, ridged, or undulate.

= 24.

= 24.