Petiole to 8 cm, densely pale brown woolly; leaf blade rhombic-ovate to elliptic or lanceolate, 1.6-4.8 X 0.6-1.9 cm, adaxially glabrous, abaxially densely pale brown woolly, base cuneate to subcordate, margin coarsely crenate to coarsely dentate or serrate, apex acute to rounded; lateral veins 4-6 on each side of midrib, indistinct. Cymes 2-8-flowered; peduncle 6-11 cm, translucent to purple-red glandular pubescent; bracts 2, deciduous, ovate to linear, 0.5-2 X 0.2-0.5 mm, pubescent, margin entire. Pedicel 0.6-1.8 cm. Calyx segments triangular to oblong, 2-2.5 mm, margin entire. Corolla yellow, 1.3-1.6 cm, outside sparsely glandular pubescent to glabrescent; tube cylindric, narrowed at mouth, 1-1.3 cm X 4-6 mm; limb 2-lipped; adaxial lip shallowly 2-lobed, lobes 3-4 X 2-3 mm; abaxial lip lobes 3-4.5 X 1.5-2 mm. Stamens adnate to corolla 1.8-4 mm above base, 3.5-7 mm; filaments slender, glabrous; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode 1, ca. 1.5 mm. Disc ca. 2 mm, shallow denticulate. Pistil 0.8-1.2 cm, glabrous. Stigma 1, disc-shaped. Capsule 2.5-2.8 cm. Fl. May-Aug, fr. Jul-Aug.
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