《中国植物志》|| 紫草科 BORAGINACEAE ||滇紫草属 Onosma L. ||西藏滇紫草 Onosma waltonii Duthie

17. 西藏滇紫草（中国高等植物图鉴）
Onosma waltonii Duthie in Kew Bull. 1912: 41. 1912; Johnst. in Journ, Arn. Arb. 32: 214. 1951;中国高等植物图鉴3: 880. 1974.
多年生草本，高约15厘米。茎基部木质化，分枝常开展，被散生硬毛及向下贴伏的短伏毛。叶长圆状倒披针形，长1-2.5厘米，宽4-6毫米，基部圆，稍抱茎，上面绿色，密伏具基盘的硬毛及短伏毛，下面淡绿色，有稠密柔毛及稀疏硬毛。花序单一，不分枝，生茎顶或腋生小枝顶端，花期直径1-2厘米；花梗细弱，长约3毫米；花萼长6-7毫米，裂片披针形，外面生硬毛，内面密生白色长柔毛；花冠蓝色，长10-13毫米，基部直径2毫米，向上逐渐扩张，喉部直径5-7毫米，外面具极不明显的短柔毛，裂片三角形，长约1.5毫米，宽约2毫米；花药侧面结合，内藏或稍伸出，不育先端长约0.5毫米，花丝细弱，长3-3.5毫米，着生花冠筒基部以上4-4.5毫米处，有不明显的短柔毛，基部下延部分线形，长2.5-3毫米，被粉质柔毛；花柱长12-14毫米，无毛；腺体高约0.2毫米，有不明显的短柔毛。小坚果长约2.5毫米，淡黄色，具光泽，有不明显的疣状突起及皱纹。花果期8月。
产西藏日喀则及江孜一带。生海拔3800米干燥山坡。模式标本采自西藏江孜。
丛茎滇紫草 p. waddellii Duthie与本种相似，但花冠外面裂片中肋有1列短伏毛，花药大部或全部伸出为其区别。

《Flora of China》|| Boraginaceae || Onosma ||西藏滇紫草 Onosma waltonii

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).