Deer grass (trichophorum cespitosum) is a genus of flowering plants in the sedge family, Cyperaceae. It is abundant on wet acid moorland. The stem has one leaf only, short and near the base, arising as an outgrowth of the topmost basal sheath.
It has anthers that open and give pollen and fruit that ripens into a brown nut. 6-18 flowers per spikelet. Each fruit is surrounded by up to 6 bristles which project slightly beyond it.