Flora of North America species comparison

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

branches twining.

10–150 cm, self-supporting, glandular-hairy, viscid;

branches not twining.

opposite proximally, alternate distally;

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

subopposite proximally, alternate distally;

blade linear to lanceolate, 10–65 × 2–10 mm, surfaces glandular-hairy.

axillary, flowers solitary.

terminal, racemes.

2–20(–25) mm.

2–4(–10) mm.

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.

chasmogamous;

calyx lobes unequal, densely glandular-hairy, adaxial lobe 5–13.5 × 2.5–5.5 mm;

corolla pale pink to red with tan-brown withered area on abaxial lip, 13–18 mm, base gibbous, mouth 3.5–5 mm diam., palate white, not veined, rounded, 5–8.5 mm diam., puberulent.

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

ovoid, 7–10 mm, glandular-hairy, abaxial locule with 1 pore.

brown, 0.5–1 mm, ridged longitudinally.

black, 1 mm, ridged, reticulate.

= 32.

= 32.