五台山棘豆 wu tai shan ji dou

Oxytropis wutaiensis var. glabrata Tatewaki & Hurusawa.

Herbs, 4-10 cm tall, acaulescent, from a multiheaded cau­dex. Stipules with a broadly triangular distinct part, ca. 3 mm, papery, sparsely villous-pilose with white long trichomes, gla­brescent, adnate to petiole, connate into a sheath, margin mem­branous. Leaves 4-5 cm, 21-27-foliolate; petiole and rachis slender, with appressed white long trichomes; leaflet blades ob­long-lanceolate, 3-6 × ca. 2 mm, both surfaces with white long trichomes when young and dense short trichomes when old, apex acuminate. Racemes compact, 2-4-flowered; peduncle 3-6 cm, with spreading white short trichomes; bracts lanceolate to ovate-lanceolate, ca. 2/3 as long as calyx tube, ca. 3 mm wide, with black and white long trichomes intermixed, apex acumi­nate. Calyx subcylindric, ca. 1.3 cm, with pubescence like bracts; lobes lanceolate, ca. 3 mm, apex acute. Corolla purple; standard ca. 1.7 cm, lamina ca. 6 mm wide, apex deeply 2-lobed and reflexed; wings ca. 1.4 cm, lamina ca. 3 mm wide, apex rounded; keel ca. 1.3 cm, beak ca. 1 mm. Ovary reportedly 2-locular. Legume unknown. Fl. May.

● Grasslands. Shanxi (Wutai Shan).