Flora of North America species comparison

petiolate;

petiole 1–8 cm;

blade simple, elliptic to ovate, 11–31 × 4–14 cm, margins entire, base acute, often with smaller axillary leaves.

petiolate;

petiole 1–10 cm;

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

terminal, becoming leaf-opposed, much-branched, 50–100-flowered, 5–24 cm.

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

erect and 0.2–0.5 cm in flower and fruit.

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

radially symmetric;

calyx slightly accrescent, unarmed, 4–7.5 mm, densely pubescent, lobes deltate;

corolla purple, stellate-pentagonal, 1–1.5 cm diam., with abundant interpetalar tissue;

stamens equal;

anthers oblong, 2–3.5 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary tomentose.

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.

yellow, globose, 1–1.5 cm diam., tomentose, without sclerotic granules.

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

yellowish brown, flattened, 1.5–2.5 × 1.5–2 mm, minutely pitted.

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

= 24.

= 24.