瑶山山黑豆 yao shan shan hei dou

Dumasia nitida var. kurziana Predeep & M. P. Nayar.

Herbs perennial, twining, all parts glabrous. Stems slender. Stipules small, linear, ca. 2 mm; petiole slender, 2-8 cm; stipels small, linear; petiolules ca. 2 mm; leaflets membranous, ovate or oblong-ovate, 2.5-6 × 1.4-3 cm, midrib convex on both sur­faces, lateral veins 5-9 per side, base truncate or broadly cune­ate, apex obtuse or almost round, with small mucro. Raceme axillary, slender, 5-13 cm, few flowered; peduncle 1.5-6 cm; bracts and bracteoles short; pedicel 2-3 mm. Calyx ca. 8 mm. Corolla light yellow; standard oblong, 10-15 mm; wings and keels oblong, slightly curved, subequal to standard, with claw and auricle at one side of base. Ovary linear to linear-oblan­ceolate; ovules 1 or 2; style linear. Legume oblong to oblan­ceolate, 3-4 × ca. 1 cm, apex with beak. Seeds 1 or 2. Fl. and fr. Sep-Oct.

Thickets along mountain roadsides; 1200-1500 m. Guangxi, Yun­nan [Myanmar].