Petiole to 10 cm, densely light brown pannose; leaf blade narrowly oblong to lanceolate, 2-8.3 X 1-3.5 cm, adaxially pubescent to densely pubescent, abaxially densely light brown pannose, base cuneate to auriculate, margin irregularly crenate to serrate or dentate, apex acute to obtuse; lateral veins 5-7 on each side of midrib, indistinct. Cymes 4-10-flowered; peduncle 7-18 cm, red to purple glandular pubescent to villous; bracts 2, linear to subulate, often deciduous, 4-5 X 0.3-0.5 mm, villous, margin entire. Pedicel 0.5-4 cm. Calyx segments linear-lanceolate, 3-5 mm, margin entire. Corolla purple to deep purple, 7-11 mm, outside glabrous; tube campanulate, 5-6 X 4-6 mm; limb 2-lipped; adaxial lip 2-sect from near base, all lobes 2-4 X 1.5-3 mm. Stamens adnate to corolla 1-2 mm above base, ca. 4 mm; filaments flattened, glabrous; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode 1, ca. 1 mm. Disc ca. 2 mm, entire. Pistil 5-8 mm, glabrous. Stigma 1, disc-shaped. Capsule 2.2-3.3 cm. Fl. Jul-Sep, fr. Oct.
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