Subshrubs. Stems 20-30 cm or more, apically puberulent. Petiole 1-5 mm; leaf blade narrowly elliptic to ovate, 0.8-2.2 cm X 4-9 mm, papery, glabrous, base cuneate, margin denticulate to serrulate, apex acute to acuminate; lateral veins obscure. Cymes 1-flowered; peduncle 2.3-4 cm, glabrous or sparsely puberulent; bracts linear, 1-2 X ca. 0.5 mm. Pedicel ca. 5 mm. Calyx 5-sect from base; segments 4-7 mm, glabrous. Corolla yellowish to pale purple with darker markings and yellow base, 3.8-4.6 cm, outside glabrous, inside sparsely puberulent at filament bases; tube funnelform-tubular, 2.7-3.2 cm X ca. 9 mm; adaxial lip ca. 4 mm; abaxial lip 1.1-1.3 cm. Stamens ca. 1.3 cm; filaments ca. 1 cm; anthers oblate; connective unappendaged; staminodes 2, ca. 5 mm. Disc ringlike, margin entire. Pistil ca. 1.7 cm, glabrous. Capsule 2.8-8 cm. Seed appendages subulate, 0.6-1.1 mm. Fl. Jul-Sep, fr. Sep.
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