Shrubs 1-3(-6) m tall, reddish hirsute. Branchlets angular; pith hollow. Petiole 2-3(-5) cm; leaf blade elliptic to broadly oblong-obovate, (12-)20-31 × (6-)12-29 cm, densely pilose or hirsute abaxially especially along veins, base broadly truncate to subcordate, margin serrate or dentate, teeth callose, apex cuspidate; lateral veins ca. 10 on each side of midrib, ending in teeth, submarginal vein absent. Inflorescences axillary, glomerate or paniculate, rarely to 4 cm, densely hirsute; bracteoles ovate. Flowers white or yellowish, ca. 3 mm. Pedicel rarely to 1 mm. Calyx lobes ovate, densely hirsute or pilose, margin narrowly scarious, ciliate, apex acute. Corolla tubular-campanulate, glabrous; tube 1.5-2 mm; lobes ca. 0.7 mm, ovate or subrounded, spreading. Stamens included, attached at middle of corolla tube; anthers broadly elliptic, ca. as long as filaments. Pistil included. Style short; stigma obscurely lobed. Fruit ovoid, 4-5 mm in diam., densely brown hirsute, apex acute or apiculate; persistent calyx lobes meeting at fruit apex. Fl. Mar, fr. Nov-Dec.

Mixed forests, hillsides, valleys, stream banks, damp places; 500-1600 m. SW and S Yunnan [Laos, Myanmar, Thailand]