《中国植物志》|| 莎草科 CYPERACEAE ||烈味薹草组 Sect. 60. Foetidae Tuckerm. ex Kukenth. ||白颖薹草（亚种） Carex duriuscula C. A. Mey. subsp. rigescens (Franch.) S. Yun Liang & Y. C. Tang

466b. 白颖薹草（亚种）
subsp. rigescens (Franch.) S. Y. Liang et Y. C. Tang in Acta Phytotax. Sin. 28 (2): 153, 1990. ——C. stenophylla Wahlenb. var. rigescens Franch. in Nouv. Arch. Mus. Paris II, 7: 128, 1884. ——C. rigescens (Franch.) V. Krecz. in Kom. Fl. URSS 3: 592, et 142, 1935; 东北草本植物志11: 187, 图版85, 图12-15, 1976.
本亚种与原亚种之区别在于雌花鳞片具宽的白色膜质边缘。叶片平张。花果期4-6月。
产辽宁、吉林、内蒙古、河北、山西、河南、山东、陕西、甘肃、宁夏、青海；生山坡、半干旱地区或草原上。分布于俄罗斯（远东地区），模式标本采自河北。

《Flora of China》|| Carex || ||白颖薹草 Carex duriuscula

504b. Carex duriuscula subsp. rigescens (Franchet) S. Yun Liang and Y. C. Tang, Acta Phytotax. Sin. 28: 155. 1990.

白颖薹草 bai ying tai cao

Carex stenophylla var. rigescens Franchet, Nouv. Arch. Mus. Hist. Nat., sér. 2, 7: 128. 1884; C. rigescens (Franchet) V. I. Kreczetowicz; C. stenophylla subsp. rigescens (Franchet) S. Yun Liang.

Leaf blades flat. Inflorescence white. Female glumes usually longer than or equaling utricles, broadly white hyaline on margins and at apex, apex subobtuse.

Slopes, semidry regions, meadows. Gansu, Hebei, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi [Russia (Far East)].