This study was carried out to clarify distributions of seventy five taxa of twelve genera in Korean Cyperaceae. Maplnfo program, which was a powerful GIS for mapping, was applied to the study. The investigated sedges were 1 species and 1 variety of Bulbostylis, 17 species and 1 variety of Cyperus, 5 species, 3 varieties and 3 forms of Eleocharis, 3 species of Eriophorum, 9 species, 4 varieties and 3 forms of Fimbristylis 1 species of Fuirena 1 species of Kobresia, 1 species of Kyllinga, 1 species of Lipocarpha, 5 species of Rhynchospora 3 subspecies and 2 varieties of Scirpus and 1 species of Scleria We illustrated distributions of 12 genera among these species. Some species of Rhynchospora Fuirena, Kobresia, Eriophorum and Scleria disappeared in certain regions, and this phenomenon was clearly demonstrated in Eriophorum gralcile. Fuirena ciliaris, Kobresia bellardii, Rhynchospora chinensis and Scleria parvula We emphasized the preservation of the ecosystem to maintain the plant diversity.
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