true sedges

Carex is a vast genus of almost 2,000 species of grassy plants in the family Cyperaceae, commonly known as sedges (or seg, in older books). Other members of the Cyperaceae family are also called sedges, however those of genus Carex may be called "true" sedges, and it is the most species-rich genus in the family. The study of Carex is known as caricology.