Lysimachia chapaensis Merr.

Herbs perennial, glabrous, 40--70 cm tall. Stems erect from prostrate base, terete or striate, herbaceous. Leaves alternate, ± aggregated toward apex of young shoots; petiole 1.5--3 cm; leaf blade ovate to ovate-elliptic or ovate-lanceolate, 6--11 X 3--6 cm, adaxially with numerous minute sunken dots, base subrounded to broadly cuneate, apex acuminate; veins 4 or 5 pairs, raised abaxially. Racemes terminal and axillary, 2--6-flowered; rachis 0.3--4(--8) cm; bracts leaflike, ovate-lanceolate, 4.5--5 cm, gradually reduced upward to 5 mm. Calyx lobes ovate-lanceolate, ca. 2.5 mm, glandular, margin membranous. Corolla yellow, deeply parted; lobes oblong, ca. 10 X 5 mm, apex obtuse. Filaments connate basally into a ring, free parts very short; anthers ca. 5 mm, basifixed, opening by apical pores, sometimes decurrent into a slit. Style ca. 6 mm. Capsule unknown. Fl. May.

SE Yunnan [Vietnam].

Mixed forests; 1000--1700 m.

Lysimachia subracemosa C. Y. Wu.