carex
noun
car·ex
ˈka(a)ˌreks
1
capitalized : a genus of perennial grasslike herbs (family Cyperaceae) of very wide distribution and distinguished by having the seedlike achenes enclosed in a sac in the axil of a bract see sedge
2
plural carices
ˈkarəˌsēz
: any plant of the genus Carex 
Word History
Etymology
New Latin, from Latin, sedge; perhaps akin to Latin carrere to card