Subshrubs, sometimes twining. Stems erect, 35-80 cm, apically puberulent. Petiole 0.9-2.5 cm; leaf blade narrowly elliptic or oblong lanceolate to oblanceolate, often falcate, 4-21 X 1.6-5.5 cm, papery, appressed pubescent, sometimes glabrescent, base cuneate to narrowly so, margin denticulate or subentire to serrate, apex acuminate; lateral veins 7-12 on each side of midrib, flat to abaxially prominent. Cymes 2-4-flowered; peduncle 4-8 cm, puberulent and sparsely glandular puberulent; bracts linear to lanceolate, 2-3(-8) X 1-2 mm. Pedicel 1.5-2.9 cm. Calyx 5-sect from base; segments 5-6 mm, outside puberulent, inside glabrous. Corolla purple with tube tinged yellow, (2-)2.7-3 cm, glabrous; tube tubular, 1.2-1.5 cm X 5-7 mm; adaxial lip 4-6 mm; abaxial lip 0.8-1.4 cm. Stamens ca. 1.2 cm; filaments ca. 1 cm; anthers subreniform; connective unappendaged; staminodes 2, 2.2-3.4 mm. Disc ringlike, margin entire. Pistil ca. 1.1 cm, glabrous. Capsule 2.8-3.2 cm. Seed appendages subulate, 0.1-0.25 mm. Fl. Sep-Oct, fr. Oct.
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