Petiole to 11 cm, densely rust-brown woolly; leaf blade lanceolate, 3-16 X 1.2-4 cm, adaxially sparsely short strigose to rarely brown villous, abaxially densely rust-brown woolly, base narrowly cuneate to broadly cuneate, margin irregularly serrate to dentate or crenate, apex acute to acuminate; lateral veins 5-9 on each side of midrib, sometimes indistinct. Cymes 2-16-flowered; peduncle 10-20 cm, brown villous; bracts 2, linear to narrowly triangular, 1.5-5 X 0.5-1 mm, rust-brown villous to sparsely pubescent, margin entire. Pedicel 0.3-3 cm. Calyx segments narrowly oblong to narrowly triangular, 2-4 mm, margin entire. Corolla greenish yellow to deep orange, 1-1.6 cm, outside pubescent; tube cylindric, narrowed at mouth, 7-10 X 3.2-5 mm; limb 2-lipped; adaxial lip 2-sect from near base, all lobes 4-5 X 0.2-0.4 mm. Stamens adnate to corolla 0.5-1.5 mm above base, 3.5-4 mm; filaments slender, glabrous; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode 1, ca. 1.2 mm. Disc ca. 1.2 mm, subentire. Pistil 4.5-6 mm, glabrous. Stigma 1, disc-shaped. Capsule 2-3 cm. Fl. Jun-Aug, fr. Aug-Sep.
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