刺荚木蓝 ci jia mu lan

Hedysarum nummulariifolium Linnaeus, Sp. Pl. 2: 746. 1753 ["nummularifolium"]; Acanthonotus echinata (Willde­now) Bentham; Alysicarpus nummulariifolius (Linnaeus) Can­dolle; H. cuneifolium Roth; H. erinaceum Poiret; H. rotundi­folium Vahl; Indigofera echinata Willdenow; Onobrychis cunei­folia (Roth) Candolle; O. rotundifolia (Vahl) Desvaux.

Herbs, perennial, prostrate. Stems with appressed medi­fixed symmetrically 2-branched trichomes. Stipules narrowly triangular, 2-2.5 × ca. 0.7 mm. Leaves simple; petiole 2-3 mm, pulvinate; leaf blade obovate-elliptic to obovate, 1-2 × 0.7-1 cm, both surfaces and vertically along margin with sparse ap­pressed medifixed trichomes, abaxially with many small dotlike glands, secondary veins 3-5 on each side of midvein, base cu­neate to broadly cuneate, apex obtuse to rounded and with a ca. 0.3 mm mucro. Racemes 1.5-2 cm; peduncle 1-1.8 cm; bracts narrowly triangular, 1.5-2 mm, not longer than buds. Pedicel 0.5-1 mm. Calyx tube ca. 1 mm; teeth narrowly triangular, 1.5-2 mm. Corolla standard broadly ovate, ca. 3 × 1.5 mm, outside hairy; wings very narrow, ca. 2.5 × 0.8 mm, glabrous; keel ca. 3.5 × 1 mm, glabrous, lateral spur small, broad, and obtuse. Stamens 2-2.5 mm; anthers ca. 0.1 × 0.1 mm. Ovary 2-2.5 mm, hairy, with 1 or 2 ovules. Legume falcate, ca. 7 × 4 mm, adaxial margin echinate near suture; endocarp not blotched. Seeds 1 per legume, reddish brown, ovoid, flattened, ca. 0.3 × 1.8 mm. Fl. Oct, fr. Oct-Nov. 2n = 16.

Sunny sandy areas near seashores, open grasslands; near sea level to 200 m. Hainan, Taiwan [Cambodia, India, Indonesia, Myanmar, Pakistan, Papua New Guinea, Philippines, Sri Lanka, Thailand, S Vietnam; Africa, N Australia, Madagascar].