Trichophorum cespitosum, commonly known as deergrass[2] or tufted bulrush,[3] is a species of flowering plant in the sedge family.

[4] Trichophorum cespitosum is a densely tufted perennial sedge often growing gregariously.

The wiry stems are round in cross section and slightly ridged, and grow up to 1 ft (30 cm) long.

[4] Flatter mires in the Alps and other montane regions are often dominated by deergrass and cottongrass (Eriophorum angustifolium), forming a community that turns brown in winter.

[6] In wet heathland it may be associated with heather (Calluna vulgaris) and purple moor grass (Molinia caerulea), and provide grazing for deer, cattle and sheep.