A perennial herb, with slender stems 3–4 ft. long and glandular-pubescent branches. Leaves long-petioled, ovate-rhomboid, membranous, 2–2 1/2 in. long, cuneate at the base, crenate, glabrous above, pubescent and gland-dotted beneath. Inflorescence racemose, simple, terminal, very lax; cymes compound, 5–7-flowered; pedicels long, glandular-pubescent; bracts ovate, persistent, foliaceous. Calyx in flower 1/5 in., in fruit above 1/3 in. long, pubescent, naked inside at the throat; upper tooth broadly ovate, acute, its edges slightly decurrent; lateral teeth shorter, lanceolate, acuminate; lower long, linear. Corolla violet, with a slender tube longer than the calyx.
