Carex davalliana, or Davall's sedge, is a species of sedge found in inland wetlands across continental Europe.

[3] It is dioecious, with male and female flowers on separate plants.

[3] The species became extinct across the British Isles in 1852 and has not reestablished since.

[4] It was only ever identified at one site in the British Isles (a calcareous mire near Bath, Somerset).

It became extinct when the land was drained for building houses.