Herbs perennial, 10--30 cm tall, aromatic when dry, with creeping stolons. Stems ascending to erect, terete or weakly angular, ca. 1.5 mm in diam. at base, upper part minutely glandular. Lower leaves scalelike. Upper leaves alternate, usually confined to upper 2/3 of stem; petiole 4--8 mm, glandular; leaf blade ovate to rhomboid-ovate or ovate-elliptic, 1.5--3(--6) X 0.7--3 cm, adaxially glabrous or initially ± setulose, base cuneate to broadly cuneate, rarely subrounded, margin obscurely undulate-crenate, apex acuminate; veins prominently reticulate. Pedicel 2--4 cm, sparsely glandular. Flowers solitary, axillary. Calyx lobes ovate, apex acuminate, 3.5--4 mm. Corolla yellow, 7--10 mm, deeply parted; lobes narrowly oblong, 6--9 X 2.7--4 mm, apex obtuse. Filaments connate basally into a ca. 0.8 mm high ring, free parts very short; anthers 3--4 mm, basifixed, opening by apical pores. Style 3.5--5 mm. Capsule 3--4 mm in diam., ca. as long as calyx. Fl. May.

Mixed forests and scrub, streamsides; 1500--2200 m. S Yunnan [N Myanmar].