Shrubs erect, 1-1.5 m tall. Petiole 5.5-6.7 cm; leaf blade broadly ovate, 10-18 × 6-13 cm, adaxially stellate hirtellous, abaxially gray stellate tomentose, base obtuse to subrotund, rarely attenuate-cuneate, margin dentate, apex acute, slightly oblique. Cymes solitary, axillary, with short, dense branches; peduncle ca. 2-3 mm; bracts and bracteoles 6-8 × 1-15 mm, 1-veined. Calyx campanulate, ca. 1.4 cm, ± conspicuously veined, teeth narrowly lanceolate, 8-9 mm; fruiting calyx enlarged, with teeth to 1.5 cm, tube eventually splitting. Corolla ca. 2.8 cm, puberulent outside, tube dilated beyond middle; upper lip straight, circular; lower lip as long as upper lip. Nutlets 1 or 2, subglobose, ca. 5 mm, not shiny. Fl. Mar-Apr, fr. Apr-Aug.
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