Petiole to 5 cm, densely brown villous; leaf blade broadly ovate to narrowly ovate, often oblique, 3-9 X 2.2-6.5 cm, appressed pubescent, abaxially densely brown villous along veins, base oblique, cordate to rounded, margin double dentate to serrate, apex acute; lateral veins 5-7 on each side of midrib, distinct. Cymes 3-10-flowered; peduncle 9-15 cm, light brown villous; bracts 2, narrowly lanceolate, 5-10 X 1-1.5 mm, pubescent, margin entire. Pedicel 0.4-1.7 cm. Calyx segments narrowly triangular to narrowly lanceolate, 6-12 mm, margin entire or sparsely dentate to serrate. Corolla yellow, 1.5-2.3 cm, outside pubescent; tube nearly cylindric, gradually slightly ampliate from base to mouth, 1.6-1.9 cm X 4-6 mm; limb slightly 2-lipped; adaxial lip 2-lobed from near middle, lobes 1.5-3 X 2-2.2 mm; abaxial lip lobes 3-5 X 3-3.5 mm. Stamens adnate to corolla 2-5.5 mm above base, sometimes slightly exserted, 1.5-1.8 cm; filaments slender, sparsely pubescent, villous basally; anthers oblong, 2-loculed, dehiscing longitudinally, connective sparsely pubescent to pubescent; staminode 1, ca. 1 cm. Disc ca. 4 mm, deeply 5-lobed to 5-sect from base. Pistil 1.6-2.3 cm, glabrous. Stigma 1, disc-shaped. Fruit unknown. Fl. Aug-Oct.
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