Description from Flora of China
Lysimachia drymarifolia Franchet var. grandiflora Bonati.
Herbs perennial, 7--35 cm tall. Stems procumbent, simple to weakly branched, with dense rust-colored multicellular hairs. Leaves opposite; petiole 1/2--2/3 as long as leaf blade, rust-colored pilose or glabrescent; leaf blade broadly ovate to suborbicular or reniform, 1--2.5 X 0.8--2.2 cm, sparsely strigillose, densely black glandular striate, base rounded to cordate, apex obtuse to rounded; veins inconspicuous. Pedicel 1--4 cm, usually 1--2 X as long as subtending leaves, rust-colored pilose or occasionally glabrescent. Flowers solitary, axillary. Calyx lobes oblong-lanceolate, 5--6 mm, abaxially sparsely pilose, narrowly hyaline margined, glabrous, apex subobtuse. Corolla yellow; tube 1.5--2 mm; lobes ovate to oblong-ovate or obtuse, sparsely black glandular striate. Filaments connate basally into a 1.5--2 mm high tube, free parts 2--3 mm; anthers ovate, dorsifixed, opening by lateral slits, ca. 1 mm. Ovary glabrous or occasionally pubescent; style 4--5 mm. Capsule unknown. Fl. Apr-May.
* Damp areas in mountain valley forests, streamsides; 1400--3500 m. SW Sichuan, C and N Yunnan.