Vol.43: Tucker, Gordon C.: Revision of the Mexican species of Cyperus (Cyperaceae). 1994. 75 figs. II,213 p. gr8vo. Paper bd.

Abstract. A revision, based on herbarium study and field work, of the89 species of Cyperus (Cyperaceae) occurring in Mexico is presented.Discussions concerning morphology, infrageneric classification, andhabitats and distribution are included. Five subgenera are representedin Mexico: 14 species are endemic (C.arsenei, C.aschenbornianus, C.calderoniae, C.dioicus, C.duripes, C.matudae, C.michoacanensis, C.nayaritensis, C.perennis, C.pycnostachyus, C.semiochraceus, C.sordidus,C.tempeae, C.wilburii). Two new species, C.hypopitys and C.tempeae, aredescribed, and one new combination, C.megalanthus, is proposed. Severalnomenclatural corrections are made: C.sordidus is the oldest name forC.howellii: C.sphaerolepis displaces C. rusbyi: C.flavicomus is thecorrect name for the species commonly called C.albomarginatus: and C.aggregatus is the correct name for C.cayennensis (sometimes also called C.flavus (Vahl( Boeck. or C. huarmensis). Extensive intergradationamong the variants of several wide-spread species showed recognition ofcertain segregates untenable: C.apiculatus is here included in C.manimae, and C.eggersii and C.macrocephalus in C.odoratus. The apparenthybridization of C.microbrunneus and C.uncinulatus in southern Mexicoand northern Central America is discussed. The following species arereported for the first time from Mexico: C.erythrorhizos, C.lundellii,C.microbrunneus, C.panamensis, C.retrorsus, and C.uncinulatus.