Petiole to 4 cm, densely rust-brown villous; leaf blade oblanceolate to narrowly ovate, 3-15.5 X 1.5-6.5 cm, adaxially sparsely rust-brown villous and white pubescent, abaxially densely rust-brown villous and white pubescent, base cuneate to broadly cuneate, margin irregularly coarsely double dentate to serrate, apex acute to obtuse; lateral veins 7-11 on each side of midrib, distinct. Cymes 2-10-flowered; peduncle 4-14 cm, sparsely to densely rust-brown villous and pubescent; bracts 2, linear to linear-lanceolate, 4-8 X 1-2 mm, sparsely rust-brown villous or pubescent, margin entire. Pedicel 0.8-2.8 cm. Calyx segments lanceolate to narrowly lanceolate, 3-5 mm, margin entire. Corolla yellow, 1.5-1.8 cm, outside glandular puberulent; tube broadly cylindric, sometimes narrowed at mouth, 9-11 X 5-8 mm; limb 2-lipped; adaxial lip 2-sect from near base, lobes 1-2 X 1-2 mm; abaxial lip lobes 3-5 X 2-4 mm. Stamens adnate to corolla 1-2 mm above base, 2.5-4 mm; filaments flattened, glabrous; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode 1, ca. 1 mm. Disc ca. 1 mm, entire. Pistil ca. 4 mm, glabrous. Stigma 1, disc-shaped. Capsule 1.5-2.5 cm. Fl. Jul-Aug, fr. Sep-Oct.
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