Subshrubs. Stems ca. 35 cm, glabrous or puberulent. Petiole 2-10(-20) mm; leaf blade narrowly elliptic to elliptic, oblong, oblong-ovate, lanceolate, to oblanceolate, 1.2-8.2 X 0.7-3.2 cm, leathery to papery, usually glabrous, abaxially sometimes puberulent, base cuneate to rounded, margin denticulate or serrulate to serrate, apex acute to acuminate; lateral veins 3-6 on each side of midrib, flat to obscure. Cymes 1-4-flowered; peduncle 1.5-4.4 cm, glabrous to puberulent; bracts linear, 1-1.5 X ca. 0.8 mm. Pedicel 5-10 mm. Calyx 5-sect from base; segments 4-8 mm, outside glabrous to puberulent, inside glabrous. Corolla white, purple striate, 2.6-5 cm, outside glabrous to puberulent, inside glabrous; tube funnelform-tubular, 1.9-3.4 X 0.9-1.2 cm; adaxial lip 3-7 mm; abaxial lip 0.9-1.5 cm. Stamens 0.9-1.5 cm; filaments 0.8-1.2 cm; anthers subglobose; connective unappendaged; staminodes 2 or 3, 0.6-3 mm. Disc ringlike, margin entire. Pistil 1.8-2.8 cm, glabrous. Capsule 2.5-5.5 cm. Seed appendages subulate, 0.5-0.8 mm. Fl. Jun-Sep, fr. Aug-Oct.
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