Description from Flora of China
Shrubs erect. Stems (0.6-)1-2 m tall, densely tawny stellate lanate. Petiole 1.5-5 cm; leaf blade ovate to ovate-elliptic, (7-)20-28 × (4-)9.5-14.5 cm, adaxially sparsely pubescent, abaxially densely gray-yellow stellate tomentose, veins conspicuously impressed adaxially, base cuneate to subrotund, margin shallowly crenate, apex apiculate. Cymes subsessile, dense, many flowered; bracts oblong, ca. 5-7 × 3-3.5 mm; bracteoles linear, 6-9 mm. Calyx campanulate, ca. 10 × 6 mm, densely tawny stellate lanate, slightly dilated and eventually splitting in fruit; teeth triangular-lanceolate, ca. 3.5 × 2.5 mm. Corolla white or yellowish, to 4.8 cm, stellate puberulent; tube ca. 1.5 mm wide, apical half dilated to 10 mm wide at throat; upper lip straight, rounded, ca. 5 × 10 mm; lower lip ca. 1.3 × 1.4 cm, middle lobe obcordate, ca. 8 × 9 mm; lateral lobes circular, ca. 10 mm wide. Ovary densely tawny hirsute. Nutlets oblong, triquetrous, dorsiventrally flattened, 6-6.5 × 3-3.5 mm, adaxially ribbed, abaxially rounded, covered with early deciduous tawny stellate hairs. Fl. Jul-Aug, fr. Sep-Apr.
* Wet forests, thickets, waste places; 800-1500 m. Guangdong, Yunnan.