扁莎组Sect. Pycreus——Cyperus Linn. subgen. Pycreus (P. Beauv. ) C.B. Clarke sect. Polystachyi C. B. Clarke in Kew Bull. Add. Ser. VIII (1908) 94, proparte; Kukenth. in Engl. Pflanzenr. Heft 101, IV, 20 (1936) 363.