Petiole to 6.5 cm, densely brown villous; leaf blade oblique, narrowly to broadly ovate, 3.5-9(-15) X 2-5(-7.5) cm, appressed pubescent, abaxially densely brown villous along veins, base oblique, cordate to rounded, margin coarsely serrate to dentate, sometimes double, apex acute to rounded; lateral veins 4-8 on each side of midrib, distinct. Cymes 1-3(-7)-flowered; peduncle 2.5-10 cm, brown villous; bracts 2, lanceolate to linear, 2-5 X ca. 1 mm, pubescent to brown villous, margin entire. Pedicel 4-15 mm. Calyx segments lanceolate to narrowly triangular, 4-7 mm, margin entire or sparsely dentate to serrate. Corolla yellow, 1.8-2.5 cm, outside pubescent; tube nearly cylindric, gradually slightly ampliate from base to mouth, 1.3-2.1 cm X 4-6 mm; limb 2-lipped to slightly 2-lipped; adaxial lip 2-lobed from near middle, lobes 1-2 X 1.5-2 mm; abaxial lip lobes 4-5 X 2-3 mm. Stamens adnate to corolla 4-5 mm above base, 1.3-1.5 cm; filaments slender, sparsely pubescent, villous basally; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective sparsely pubescent; staminode 1, ca. 7 mm. Disc 2-3 mm, deeply 5-lobed to 5-sect from base. Pistil 1.6-1.9 cm, glabrous. Stigma 1, disc-shaped. Capsule 2.6-3 cm. Fl. Aug-Sep.
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