海南猪屎豆 hai nan zhu shi dou

Herbs, prostrate. Branches sparsely hirsutulous. Stipules subulate to ovate-lanceolate, ca. 2 mm. Leaves simple; petiole short; leaf blade obovate to obovate-elliptic, 1-3 × 1-2 cm, both surfaces glabrescent, veins abaxially raised, base broadly cuneate, apex obtuse and mucronate. Racemes terminal, 1-3-flowered; bracts ovate-triangular, ca. 3 mm. Pedicel 2-6 mm; bracteoles inserted on pedicel at or below middle, linear, ca. 1 mm. Calyx 2-lipped, 8-10 mm, parted, pubescent; lobes lanceo­late. Corolla yellow or purplish red; standard rhombic to sub­orbicular, 0.8-1.2 cm, glabrous, base with 2 appendages; wings oblong, 8-10 mm; keel ± as long as standard, narrowed basally from middle, apically extended into a long twisted beak. Ovary subsessile. Legume oblong, 2-3 cm, 10-15-seeded, densely rusty pilose. Seeds brown, reniform, glabrous. Fl. Aug-Oct, fr. Sep-Dec.

● Dry grasslands, open sands. Hainan (Changjiang).