Carex vesicaria is an essentially Holarctic species of sedge known by the common name Blister Sedge.

S11 Carex vesicaria swamp Caricetum vesicariae Br.-Bl.

A mix of dried specimens of several species of Carex (including Carex vesicaria) have a history of being used as thermal insulation in footwear (such as skaller used by Sami).

The larvae feed on Carex elata, Carex ericetorum, Carex ferruginea, Carex sylvatica, Carex vesicaria, Eriophorum angustifolium, Eriophorum latifolium, Eriophorum vaginatum and Scirpus sylvaticus.

The meadows are surrounded by conifers and meadow species may include Deschampsia cespitosa, Alopecurus pratensis, Phleum pratense, Poa palustris, Juncus tenuis, Juncus ensifolius, Carex vesicaria, Carex microptera, Agrostis idahoensis, Fragaria virginiana var.