Description from Flora of China
Herbs perennial, glabrous. Stems erect or ascending, 10--20(--40) cm, quadrangular or narrowly winged. Lower leaves scalelike. Upper leaves 3 or 4 crowded at apex of stem, forming a terminal whorl, subsessile, broadly ovate to elliptic, 7--16 X 5--12.5 cm, papery, faintly whitish farinose, base rounded to broadly cuneate, apex rounded to obtuse; veins 5 or 6 pairs, raised abaxially; veinlets obscure. Racemes in axils of terminal leaves, rarely arising from axils of lower scalelike leaves, abbreviated, many flowered. Pedicel 0.5--2 cm, reddish glandular punctate. Calyx lobes lanceolate, 6--8 X ca. 2 mm, minutely brownish glandular, especially inside. Corolla yellow, ca. as long as to slightly longer than calyx, deeply parted; lobes ovate-oblong, ca. 8 X 2.5--3.5 mm, apex acute. Filaments connate basally into a ring, free parts ca. 1 mm; anthers 4--5 mm, basifixed, opening by apical pores. Style ca. as long as to slightly longer than stamens. Capsule globose, 2--3 mm in diam. Fl. Jun.
* In thickets on calcareous formations. C Guangxi (Xincheng Xian).