Shrubs 1-3 m tall. Branches robust, striate, densely tawny bristly, finely glandular pilose. Petiole 4-5 cm, robust, bristly, densely glandular pilose; leaf blade ovate, ca. 9 × 6.5 cm, pilose along veins, sparsely bristly adaxially, densely so abaxially, base shallowly cordate, margin coarsely lobulate to double crenate, apex ± acuminate. Cymes solitary or paired, bristly, densely glandular pilose, 3-7-flowered; peduncle 3.5-5 cm; floral leaves gradually reduced; bracteoles ± linear, 1-1.5 cm, villous. Pedicel ca. 1.5 cm. Calyx campanulate, 1.5-1.8 cm in flower, dilated in fruit, bristly, finely glandular pilose outside, glabrous inside; teeth 5, ovate-triangular to narrowly triangular, 5-6 mm, equal, callose acuminate, margin ciliate. Corolla yellow, ca. 3.7 cm, glabrous except for pubescent limb outside; tube ca. 3 cm, dilated at apex, ca. 1 cm wide at throat; upper lip ca. 3 × 8 mm, emarginate; middle lobe of lower lip ca. 8 × 11 mm, margin dentate, apex emarginate, lateral lobes ca. 3 mm. Filaments puberulent. Style subequally 2-cleft. Immature nutlets brown, oblong-ellipsoid, flattened, winged, base attenuate, apex acute, finely striate. Fl. Nov.
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