Description from Flora of China
Jasminum cordatulum (Merrill & Chun ex L. C. Chia) L. C. Chia; J. seguinii H. Léveillé var. cordatulum Merrill & Chun ex L. C. Chia.
Shrubs scandent, ca. 2 m, glabrous or nearly so. Branchlets slender when young. Leaves opposite, simple; petiole 2-7 mm, articulate, pubescent; leaf blade oblong or obovate-oblong, rarely oblong-lanceolate, 4.5-9 × 2-4 cm, papery, with hair tufts in vein axils abaxially, base truncate to subcordate, apex slightly acuminate to acute; primary veins 4-7 on each side of midrib, slightly raised. Cymes terminal or axillary, (1 or)2-5-flowered; bracts linear or broadly linear. Pedicel 2-10 mm, slightly thickened upward. Calyx campanulate, ca. 3 mm; lobes 4, deltate, 0.5-1 mm. Corolla yellow-white; tube 1.3-1.7 cm; lobes 5, narrowly lanceolate, 8-10 mm. Berry subglobose, 5-7 mm in diam. Fl. Aug-Sep, fr. Dec-Feb.
Sparse woods, sandy areas; low elevations. Hainan [Cambodia, Vietnam]