Description from Flora of China
Herbs perennial, to 30 cm tall. Stems prostrate, ascending, branched in upper part, with dense rust-colored multicellular 0.5--0.8 mm hairs. Leaves opposite; petiole ca. 1/2 as long as to ca. as long as leaf blade; leaf blade broadly ovate, rarely suborbicular, 0.5--3 X 0.3--2.7 cm, abaxially pilose, sparsely transparent glandular punctate, adaxially strigillose, base truncate, occasionally cuneate, apex obtuse to subrounded; veins inconspicuous. Pedicel 3--4 mm, rust-colored pilose. Flowers solitary, in axils of upper leaves. Calyx lobes lanceolate, 4--6 mm, pilose, apex acuminate. Corolla yellow, ca. 1.2 cm in diam.; tube ca. 2 mm; lobes obovate to broadly elliptic, 6--7 X 4--5 mm, transparent glandular punctate, apex rounded. Filaments connate basally into a ca. 2 mm high tube, free parts 4--5 mm; anthers ovate-oblong, dorsifixed, opening by lateral slits, ca. 1.5 mm. Ovary ovoid; style ca. 4.5 mm, pubescent on lower part. Capsule subglobose, 3--4 mm in diam. Fl. May-Jun.
* N-facing mountain slopes, grassy areas, in shrubs; 400--700 m. SW Zhejiang (Longquan Xian).