Flora of North America species comparison

10–60 cm, self-supporting, glandular-hairy;

branches not twining.

blade oblanceolate.

opposite proximally, alternate distally;

blade linear to oblanceolate, 7–43 × 3–6(–10) mm, surfaces glandular-hairy.

axillary, flowers solitary.

1–2 mm.

1–4 mm.

calyx lobes subequal, 3–7 mm;

corolla white to pale lavender, veins not contrasting, 7–14 mm, palate angular, glabrous or hairy, often with 2 yellow patches.

chasmogamous;

calyx lobes equal or subequal, glandular-hairy, hairs long, eglandular, adaxial lobe 3–7 × 1 mm;

corolla white to pale lavender, often violet-veined, 9–14 mm, base spurred, mouth 2–3 mm diam., palate sometimes purple-veined, rounded or angular, 3.5–6.5 mm diam., glabrous or hairy.

ovoid, 5–7 mm, glandular-hairy, abaxial locule indehiscent or with 1 pore.

ridges reticulate.

black to dark brown, 1 mm, tuberculate and longitudinally ridged.

= 32.