Pycreus sanguinolentus form. rubro-marginatus (Schrenk) L. K. Dai, comb. nov.——Cyperus sanguinolentus Vahl form. rubro-marginatus (Schrenk) Kukenth. in Engl. Pflanzenr. Heft 101, IV, 20 (1936) 386——Cyperus eragrostis Vahl form. rubro-marginatus Kukenth. in Meddel. Goteb. Bot. Tradg. V (1929) 33 et. 107——Cyperus flavescens form. rubro-marginatus Schrenk in Fisch. et Mey. Enum. Pl. Nov. I (1841) 3.

稈与叶均纤细；简单长侧枝聚繖花序头状，具少数小穗。花果期8-9月。

产于山西、河北、四川；生长于沼泽、河边、山沟等处。也分布于喜马拉雅山区以及中亚细亚。