Flora of North America species comparison

7–170 cm, not self-supporting, glabrous, eglandular-hairy, or glandular-hairy;

branches twining.

3–45 cm, not self-supporting, glabrous;

branches twining.

opposite proximally, alternate distally;

blade ovate to narrowly elliptic, 10–60 × 1–20 mm, surfaces glabrous or hairy.

opposite proximally, alternate distally;

blade elliptic to linear, 5–35 × 1–7 mm, surfaces glabrous.

axillary, racemes or flowers solitary.

axillary, flowers solitary.

1–4 mm.

1–12 mm.

cleistogamous and chasmogamous;

calyx lobes unequal, glandular-hairy, adaxial lobe 3.5–14 × 1–9 mm;

corolla light purple to white, often dark-veined, 8–17 mm, base gibbous, mouth 2–4 mm diam., palate sometimes purple-veined, convex, 3.5–8 mm diam., puberulent.

chasmogamous and cleistogamous;

calyx lobes unequal, glandular-hairy, adaxial lobe 4–5.5 × 1.5–2 mm;

corolla white, purple-veined, 5.5–7 mm, base gibbous, mouth 3–3.5 mm diam., palate purple-veined, angular, 2.5–3 mm diam., minutely papillate.

ovoid, 4–8 mm, glandular-hairy, abaxial locule with 1 pore.

ovoid to globular, 3–4.5 mm, glandular-hairy, abaxial locule with 1 pore.

dark brown to black, 0.7–1.5 mm, tuberculate, reticulate-ridged.

black, 1 mm, reticulate, ridged, or tuberculate.

= 30.

= 30.