Trichophorum alpinum, commonly known as alpine bulrush[1] or cotton deergrass,[2] is a species of flowering plant in the sedge family.

It is present in Europe, Asia, and northern North America.

[3] This sedge produces stems up to 40 centimeters (16 in) tall from a short rhizome.

The flowers have cottony white bristles that may extend 2 centimeters (0.79 in) past the spikelet.

[3][4] This plant grows in bogs and calcareous mountain meadows.