Flora of North America species comparison

petiolate;

petiole 1–10 cm;

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

petiolate;

petiole 2–10 cm;

blade simple to twice-compound, ovate to elliptic, (2–)4–16 × 3–12 cm, margins lobed to 1–2 times divided with 2–4 main leaflets per side, leaflets with deep, rounded lobes, base truncate to subcordate.

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

extra-axillary, unbranched, 5–12-flowered, 4–11 cm.

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

0.5–1.5 cm in flower, erect and 0.5–1.5 cm in fruit.

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.

bilaterally symmetric;

calyx accrescent and tightly covering fruit, densely prickly or bristly, 7.5–12.5 mm, densely stellate-pubescent, lobes linear to lanceolate;

corolla yellow, rotate-pentagonal, 1.5–3.5 cm diam., with abundant interpetalar tissue;

stamens unequal, lowermost much longer and curved;

anthers narrow and tapered, dehiscent by terminal pores, short anthers 4, yellow, 6–8 mm, longer anther reddish or purplish, 10–14 mm;

ovary glabrous.

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

brown, globose, 1–1.2 cm diam., glabrous, dry, without sclerotic granules.

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

dark brown, flattened, 2–3 × 1.8–2 mm, minutely pitted and irregularly ridged.

= 24.

= 24.