3. Lotus angustissimus Linnaeus, Sp. Pl. 2: 774. 1753.
尖齿百脉根 jian chi bai mai gen
Lotus praetermissus Kuprianova.
Herbs, annual or biennial, rarely short-lived perennial, (5-)10-30(-50) cm, glabrescent or sparsely pilose, stems and peduncles and often other parts of plant with long (1-2.5 mm) spreading hairs, stems also with short (0.1-0.6 mm) semiappressed trichomes. Stems erect, prostrate or ascending, branched, slender. Leaflets 5, acute, apical 3 elliptic to narrowly elliptic or rhombic, 7-17 × 2-6 mm, basal 2 obliquely ovate, shorter than apical ones. Umbels 1- or 2(or 3)-flowered; peduncle 0.5-4 cm; sterile bract with 1-3 leaflets. Flowers 5-8(-8.5) mm. Calyx 4-5 mm; teeth filiform, longer or shorter than tube. Corolla yellow or orange. Style 2.5-3(-3.5) mm. Legume light to dark brown, straight, cylindric, 5-28 × 1-1.5 mm, 12-28-seeded. Seeds yellow or brown, 1-colored or spotted, globose, 0.9-1.2 mm. Fl. Jun-Oct, fr. Jul-Nov.
Moist grasslands, sandy soils by margins of swamps and ravines; 500-1200 m. Xinjiang [Kazakhstan, Russia (European part, Siberia); N Africa, SW Asia, N Atlantic islands, Europe; introduced in S Africa, Australia, W North America, and Pacific islands (New Zealand)].
This is probably an introduced species in China.