15. Onosma waltonii Duthie, Bull. Misc. Inform. Kew. 1912: 41. 1912.
西藏滇紫草 xi zang dian zi cao
Herbs perennial, ca. 15 cm tall. Stems woody, branched, usually spreading, sparsely hispid, short strigose. Leaf blade oblong-lanceolate, 1-2.5 cm × 4-6 mm, abaxially light green, densely pubescent and sparsely hispid, adaxially green, densely hispid and short strigose, hairs discoid at base, base rounded, slightly clasping. Inflorescences solitary, terminal, not branched, 1-2 cm wide at anthesis. Pedicel slender, ca. 3 mm. Calyx 6-7 mm; lobes lanceolate, hispid outside, densely white villous inside. Corolla blue, 1-1.3 cm, base ca. 2 mm wide, gradually expanded upward; throat 5-7 mm wide, obscurely pubescent outside; nectary ca. 0.2 mm, glabrescent; lobes erect, triangular, ca. 1.5 × 2 mm, margin revolute. Filaments slender, 3-3.5 mm, inserted 4-4.5 mm above base of corolla tube, decurrent part linear, 2.3-3 mm, minutely pubescent, appearing mealy; anthers laterally united, included or slightly exserted; apex sterile, ca. 0.5 mm. Style 1.2-1.4 cm, glabrous. Nutlets light yellow, ca. 2.5 mm, shiny, obscurely tuberculate, wrinkled. Fl. and fr. Aug.
* Arid hillsides; ca. 3700 m. Xizang (Jiangzi Xian).