Description from Flora of China
Lysimachia ramosa Wallich ex Duby.
Herbs erect, to 60 cm tall, with numerous fibrous roots. Stems distinctly quadrangular, to 7 mm in diam., woody at base, usually many branched. Leaves alternate, subsessile or petiole to 1 cm; leaf blade lanceolate to elliptic-lanceolate, 3--11 X 0.5--2.8 cm, tapering to both ends, becoming yellowish brown when dry, abaxially glabrous, minutely brownish glandular, adaxially ± setulose; midvein and veins prominent; veinlets conspicuously reticulate. Pedicel 2--4 cm. Flowers solitary, in axils of medial and upper leaves. Calyx lobes ovate-elliptic, 3--4 mm, margin submembranous, often stalked glandular, apex acuminate; veins 7--9. Corolla yellow, 6--8 mm, deeply parted; tube ca. 2 mm; lobes elliptic-obovate, apex obtuse. Filaments connate basally into a ca. 0.5 mm high ring, free parts ca. 2.3 mm, flattened; anthers 2.5--3 mm, basifixed, opening by lateral slits. Style ca. 3 mm. Capsule slightly depressed-globose, ca. 5 mm in diam., 5-valved to base.
* Mixed forests; 1000--2100 m. S Yunnan [India, Indonesia (Java, Sumatra), Myanmar, Nepal, Sri Lanka, Thailand, Vietnam].