What is "eriophorum vaginatum"

Hare's-tail \Hare's"-tail`\ (-t[=a]l`), n. (Bot.) A kind of grass ( Eriophorum vaginatum). See Cotton grass, under Cotton.

Hare's-tail grass (Bot.), a species of grass ( Lagurus ovatus) whose head resembles a hare's tail.

Eriophorum vaginatum L. (hare's-tail cottongrass, tussock cottongrass, 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 erect solitary spikelets.