Flora of North America species comparison

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

branches twining.

6–200 cm, not self-supporting, glandular-hairy;

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 ovate, 2–60 × 1–50 mm, surfaces glandular-hairy.

axillary, racemes or flowers solitary.

axillary, flowers solitary.

1–4 mm.

2–20(–25) 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.

cleistogamous and chasmogamous;

calyx lobes equal, glandular-hairy, adaxial lobe 3–6 × 1–3.5 mm;

corolla pale purple to purple, sometimes dark-veined, 7–12 mm, base slightly gibbous, mouth 2.5–3.5 mm diam., palate white, purple-veined, rounded, 2.5–6 mm diam., puberulent.

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

ovoid, 3–11 mm, glandular-hairy, abaxial locule with 1 pore.

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

brown, 0.5–1 mm, ridged longitudinally.

= 30.

= 32.