In this paper we present a list of type specimens of 20 taxa belonging to four genera of the Cyperaceae family that are stored in the M.G. Popov Herbarium in the Central Siberian Botanical Garden SB RAS (NSK) and partly in the Herbarium of the V.L. Komarov Botanical Institute RAS (LE). For each type specimen we give category, quote of the original label, and protologue data, as well as comments. We list 46 type specimens, including 4 lectotypes, 3 isolectotypes, 5 holotypes, 7 isotypes, 18 paratypes, and 9 authentic specimens. Lectotypes for name of 4 taxa were designated: Carex behringensis C.B. Clarke var. pallidior Popov, C. leucochlora Bunge var. subglabra V.N. Vassil., C. sylvatica Huds. f. angustifolia Litv., Scirpus affinis Roth. var. maritimoides Drob. f. megalostachys Litv. Information about the 8 holotypes, 4 isotypes, 2 lectotypes, 3 isolectotypes, 2 syntypes from Herbarium LE, MW are cited.Key words: Cyperaceae, type specimens, typification, M.G. Popov Herbarium.