Publication: Fl. Bor. -Amer. 2: 173. 1803, not Stokes 1787.
selected vouchers: WTU
Notes: C. rostrata misapplied to the taxon C. utriculata in H&C.
FNA23: "Carex rostrata is infrequent and local in large portions of its range, often forming large colonies where found. Carex rostrata hybridizes with C. oligosperma and C. saxatilis; rare sterile intermediates with C. utriculata are likely hybrids. The vast majority of records of C. rostrata from North America are C. utriculata."