Eriophorum vaginatum, the hare's-tail cottongrass, tussock cottongrass, or sheathed cottonsedge, is a species of perennial herbaceous flowering plant in the sedge family Cyperaceae. It is native to bogs and other acidic wetlands throughout the Holarctic Kingdom. It is a 30–60 cm high tussock-forming plant with solitary spikes.
Eriophorum vaginatum is a 30– to 60-cm-high tussock-forming plant with extremely narrow, almost hair-like leaves. On the flowering stems there is a single, inflated leaf-sheath, ...