Flora of North America species comparison

8–85 cm, not self-supporting, basally hairy, otherwise glabrous;

branches twining.

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

branches not twining.

opposite proximally, alternate distally;

blade linear, 5–55 × 1–4 mm, surfaces glabrous.

subopposite proximally, alternate distally;

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

axillary, flowers solitary.

terminal, racemes.

4–25(–30) mm.

2–4(–10) mm.

cleistogamous and chasmogamous;

calyx lobes equal, glandular-hairy, adaxial lobe 2.5–4 × 1–1.5 mm;

corolla light purple, purple-veined, 5.5–7 mm, base barely gibbous, mouth 2–2.5 mm diam., palate purple-veined, angular, 2.5–4 mm diam., minutely papillate.

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.

globular-ovoid, 2.5–6 mm, glandular-hairy, abaxial locule with 1 pore.

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

black, 0.6–1 mm, tuberculate.

black, 1 mm, ridged, reticulate.

= 30.

= 32.