Carex communis

Carex communis, the fibrous-root sedge, is a species of flowering plant in the genus Carex, native to central and eastern Canada and the central and eastern United States. Its seeds are dispersed by ants.

Subtaxa
The following varieties are accepted:
 * Carex communis var. amplisquama (F.J.Herm.) Rettig
 * Carex communis var. communis