Flora of North America species comparison

petiolate;

petiole 1.5–3.5 cm, sometimes with pair of pinnatifid pseudostipules at base;

blade compound, elliptic to ovate, 7–15 × 4–9 cm, margins divided into 1–4(–5) pairs of leaflets, leaflet margins entire, base attenuate.

petiolate;

petiole 0.2–0.5 cm;

blade simple, elliptic, 0.9–6.8 × 0.6–2.2 cm, margins entire, base acute to attenuate or decurrent.

terminal, extra-axillary, generally forked or 3-fid, 4–10(–20)-flowered, to 3 cm.

leaf-opposed, unbranched, 5–20-flowered, 0.3–1.2 cm.

articulated near middle, 1.6–3 cm in flower and fruit.

ca. 0.5 cm in flower, ca. 1.2 cm and erect in fruit.

radially symmetric;

calyx not accrescent, unarmed, 4–6 mm, glabrous to sparsely pubescent, lobes deltate-acuminate;

corolla white, stellate, 2.8–3.5 cm diam., without interpetalar tissue;

stamens equal;

anthers oblong, slightly tapered, 5–6 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

radially symmetric;

calyx somewhat accrescent, unarmed, 1.5–2 mm, glabrous, lobes deltoid;

corolla white, often tinged with lavender, stellate, 0.7–1 cm diam., without interpetalar tissue;

stamens equal;

anthers oblong, 1.5–2 mm, dehiscent by terminal pores that open into longitudinal slits;

ovary glabrous.

green, globose, ca. 1 cm diam., glabrous, without sclerotic granules.

yellow to orange, globose, 0.7–1.2 cm diam., glabrous, without sclerotic granules.

dark reddish brown, rounded, 1–2 mm diam., rugose.

pale yellow or tan, flattened, ca. 3 × 2.5 mm, minutely pitted.

= 24.

= 24.