Carex
Carex, the sedges, is a genus of about 2,100 species in Cyperaceae, defined by the perigynium and unisexual flowers, cosmopolitan but cold-temperate-rich, with holocentric chromosomes (n = 6 to 56) and a 2015 monophyletic circumscription absorbing Kobresia, Uncinia, Schoenoxiphium, and Cymophyllus.