Shrubs erect. Branchlets striate, densely, tawny bristly, finely glandular pilose. Petiole 0.5-2.8 cm, densely bristly, finely glandular pilose; leaf blade ovate, 6-8 × 4-4.5 cm, reduced at apex, glandular, finely pilose adaxially and along veins abaxially, sparsely pubescent abaxially, base cordate, margin coarsely double incised crenate, apex acuminate. Cymes bristly, finely glandular pilose, solitary or paired, 3-to many flowered; peduncle subsessile to 1.8 cm; bracts leaflike, oblanceolate, ca. 8 mm, widely spaced 1-or 2-serrate to subentire, finely pilose, glandular. Pedicel 2-4 mm. Calyx campanulate, ca. 1.3 cm, finely pilose along veins and margin outside, glabrous inside; teeth 4 or 5, deltoid, equal, ca. 3 mm, callose acute. Corolla pale yellow, to 3.5 cm in flower, ca. 8 mm wide at throat, limb finely pilose outside, glabrous inside; upper lip ca. 4 × 7 mm, apex rounded; lower lip ca. 0.8 × 1.5 cm, middle lobe largest, ca. 6 × 7 mm, emarginate; lateral lobes ovate, ca. 4 mm wide. Filaments finely pilose. Ovary black-brown, glabrous. Style equally 2-cleft.
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