Description from Flora of China
Herbs, annual, 10-15(-100) cm tall, many branched, white spreading pilose. Stems erect, procumbent, or ascendant, base slightly woody. Stipules ca. 4 mm. Leaves (5-)9-13(-21)-foliolate; rachis 5-10 cm, including petiole ca. 1 cm; leaflet blades narrowly oblong to oblanceolate, 1-3 × 0.3-0.7 cm, abaxially densely gray pubescent, adaxially appressed puberulent, secondary veins 10 on each side of midvein, base cuneate, apex rounded or retuse and cuspidate. Pseudoracemes axillary, with 4-8 flowers gathered on apical half of rachis. Pedicel 3-4 mm. Flowers ca. 7 mm. Corolla pale red flushed with purple. Legume linear, 2.5-3.5 cm × ca. 4 mm, slightly curved, strigose, apex with a straight beak. Seeds 7-12 per legume, black, subglobose, ca. 2 mm. Fl. and fr. year-round.
Open sandy seashores; near sea level. Guangdong (Xisha Qundao: Yongxing Dao) [Indonesia, Philippines, Thailand].