﻿AbstractCarexsect.Mitrataes.l. was established by Kükenthal in 1909 and can be distinguished from the closely related sections in having nutlets frequently discoid-annulate at the apex and a persistent style base. Based on field surveys and specimen examination, three new species of sect.Mitrataeare described and illustrated here.Carexfatsuanianawas collected from Yunnan and differs fromC.truncatiglumain having the utricles nearly glabrous, the nutlets with a ca. 0.5 mm long beak at the apex, the staminate spikes cylindrical, 5–7.5 cm long, 4–5 mm wide, and the pistillate glumes acuminate at the apex.Carexdamingshanicawas collected from Guangxi and differs fromC.breviscapaandC.rhynchachaeniumin having 3 or 4 spikes, the lateral spikes cylindrical, the pistillate glumes, utricles and nutlets all shorter than in the other two species.Carexradicalispiculawas collected from Sichuan and differs fromC.truncatirostrisin having the staminate spikes clavate, 1.5–2 mm wide, the pistillate glumes pale yellow-white, 3–3.2 mm long, acuminate or short-awned at the apex, and the nutlets with 3 angles shallowly constricted at the middle.