3. Calophaca sinica Rehder, J. Arnold Arbor. 14: 210. 1933.
丽豆 li dou
Shrubs, 20-40 cm tall. Stems many branched; bark bright, glabrous, with pale yellow grains; young branches pale brown sericeous. Stipules linear, ca. 2 cm, brown, with dense short trichomes, basally connate, apex acuminate. Leaves 2-9 cm, 5-11-foliolate; leaflet blades orbicular to ovate, 1-2.5 × 0.7-1.8 cm, leathery, both surfaces grayish white and with dense appressed trichomes, veins conspicuous, base rounded, apex shortly acute. Inflorescences subcapitate, 4- or 5-flowered; peduncle 5-12 cm, hard, with dense spreading long trichomes; bracts 2-4 mm, base triangular, apex acuminate. Flowers ca. 2.5 cm; pedicel 3-6 mm, with dense trichomes; bracteoles 2, ovate, linear, or oblong, ca. 5 mm, caducous, abaxially with dense short trichomes. Calyx broadly campanulate, 1.5-2 cm, with short white trichomes, base slightly gibbous; teeth triangular-lanceolate, 1/3-1/2 as long as tube, both surfaces with dense trichomes. Corolla yellow; standard ca. 2.5 cm, outside with dense trichomes, lamina orbicular, ca. 1.5 cm wide, base broadly cuneate and with a ca. 4 mm claw, apex emarginate; wings ca. 2.2 cm, lamina ca. 14 × 5 mm, outside rarely with white trichomes, basally narrowed with ca. 1.5 mm auricles and a ca. 5 mm incurved claw, apically enlarged, apex truncate to obtuse; keel ca. as long as wings, outside rarely with long white trichomes, lamina ca. 6 mm wide, basally with short blunt auricles and with a ca. 7 × 2 mm claw, apex truncate. Stamens 1.5-1.8 cm; anthers orbicular, ca. 0.5 mm in diam. Ovary oblong, with white appressed trichomes; style with semiappressed trichomes but glabrous at apex. Legume 1.5-4.5 cm, ca. 9 mm wide in apical part, with dense white short trichomes and with glandular trichomes, apex beaked. Seeds olive-green, ellipsoid-reniform, ca. 3 × 2 mm, glabrous, smooth. Fl. May-Jun, fr. Jun-Aug. 2n = 16*.
● N-facing valley slopes, among shrubs, dunes of loess; 900-1800 m. W Hebei, Nei Mongol, Shanxi.