Petiole 5-15 cm, densely brownish pubescent; leaf blade oblique, ovate to broadly ovate, 8-17.5 X 5.2-13.5 cm, adaxially pubescent, abaxially puberulent, base very oblique, broadly cuneate on 1 side, nearly cordate to auriculate-peltate on other, margin irregularly denticulate, apex acute; lateral veins abaxially conspicuous. Cymes 3-7-flowered; peduncle 6-10 cm, pubescent; bracts ovate to lanceolate, unequal, 5-12 mm. Pedicel 0.5-2.2 cm. Calyx actinomorphic, 5-sect from base; segments equal, lanceolate-linear to narrowly triangular, 6.5-8 X 1.5-2.5 mm, outside puberulent. Corolla white, purplish adaxially near base, outside glabrous, inside densely minute yellow glandular and sparsely pubescent below abaxial lip; tube ca. 4 mm; adaxial lip ca. 7 mm, distinctly 2-lobed; abaxial lip ca. 6 mm. Filaments 0.8-1 mm, puberulent; anthers narrowly ovoid, 2.8-3 mm, beaked ca. 0.3 mm; staminodes 3. Pistil ca. 1 cm; ovary ca. 3.5 mm, puberulent. Style glabrous. Capsule ca. 6 mm. Fl. Aug-Sep, fr. Sep.
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