10. Tephrosia ionophlebia Hayata, Icon. Pl. Formosan. 9: 21. 1920.
台湾灰毛豆 tai wan hui mao dou
Herbs, perennial, suffrutescent. Stems erect or ascendant, appressed yellow puberulent. Stipules 3-6 mm, abaxially strigose, apex acuminate. Leaves 13-17(-21)-foliolate, sometimes with axillary cataphylls; rachis 6-8 cm, including petiole 1-1.5 mm; leaflet blades oblong-oblanceolate, 15-18 × ca. 5 mm with largest at middle of rachis, abaxially sparsely strigose, adaxially glabrescent, secondary veins ca. 9 on each side of midvein, reticulate veins clearly marked and purplish red especially abaxially, base broadly cuneate, apex rounded to retuse and cuspidate. Pseudoracemes terminal or opposite a leaf, 2-5 cm, straight, strigose, elongated in fruit. Pedicel ca. 4 mm, slender. Flowers ca. 1 cm. Calyx ca. 5 × 3 mm. Corolla red; standard broadly orbicular, outside pubescent. Ovary linear, with numerous ovules. Legume linear, 3.5-4 cm × ca. 4 mm, strigose, apically slightly curved. Seeds 5-7 per legume, pale brown, ellipsoid, ca. 3 × 1.5 mm, scabrous. Fl. and fr. Sep-Dec.
● Open places or wastelands. Taiwan.
This species was treated as Tephrosia purpurea in Fl. Taiwan (ed. 2, 3: 371. 1993).