1. Corethrodendron scoparium (Fischer & C. A. Meyer) Fischer & Basiner, Bull. Cl. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg. 4: 315. 1845.
细枝山竹子 xi zhi shan zhu zi
Hedysarum scoparium Fischer & C. A. Meyer, Enum. Pl. Nov. 1: 87. 1841; H. arbuscula Maximowicz.
Shrublets, 0.7-2(-3) m tall. Stems pale yellow to brown, erect, with fibrous stripping. Stipules ovate-lanceolate, 5-6 mm, basally connate. Leaves 10-25 cm, basal ones 7-11-foliolate, apical ones 3- or 5-foliolate or sometimes none; leaflet blades linear-oblong to narrowly lanceolate, 1.5-3 × 0.3-0.6 cm, abaxially pilose, adaxially pubescent to glabrous. Racemes lax, with many flowers; bracts ovate, 1-1.5 mm; peduncle longer than leaves. Pedicel 2-3 mm. Calyx campanulate, 5-6 mm, pubescent; teeth triangular, unequal, abaxial 3 longer than adaxial 2. Corolla purple; standard obovate-orbicular, 1.5-1.9 cm; wings ca. 1/2 as long as standard; keel slightly shorter than standard. Ovary pubescent. Legume divided into 2-4 articles; articles broadly ovoid, 5-6 × 3-4 mm, inflated, densely white lanate. Fl. Jun-Sep, fr. Aug-Oct. 2n = 16*.
Sandy areas in deserts and semideserts; 600-1100 m. Gansu, W Nei Mongol, Ningxia, Qinghai, N Shaanxi, N Xinjiang [Kazakhstan, S Mongolia].
Plants of this species are important in arid regions for dune-fixing.