Herbs perennial, to 30 cm tall. Stems 1 to many, erect, much branched and glandular in upper part, finely glandular striate. Leaves alternate; petiole ca. 2 mm; leaf blade elliptic to rhomboid-elliptic, 6--9 X 1.5--3 mm, papery, densely glandular punctate, base cuneate, decurrent, margin narrowly revolute, apex acute; midvein raised abaxially; veinlets obscure. Pedicel 6--12 mm, glandular. Flowers solitary, axillary. Calyx lobes ovate-lanceolate, ca. 3 mm, copiously minutely glandular. Corolla yellow, deeply parted; lobes oblong, ca. 5 X 1.5 mm, dark glandular punctate. Filaments connate basally into a ring, free parts ca. 1 mm; anthers ca. 3 mm, basifixed, opening by apical pores. Style slightly longer than stamens. Capsule globose, ca. 3 mm in diam. Fl. May-Jun.

* On limestone rocks. W Guangxi (Tianyang Xian).