Corynephorus canescens or grey hair-grass is a grass in the Corynephorus genus of the Poaceae family.

Grey Hair-grass (Corynephorus canescens)

Bird's-foot trefoil, pyramidal orchid, bee orchid, lesser centaury and carline thistle flower on the more stable dunes, where the rare Jersey cudweed and grey hair-grass are also found.

The sandy soils have been settled by nutrient-poor grasslands of Elijah Blue Fescue and Grey Hair-grass, the pioneer vegeation of open, sunny, sandy terrain outside littoral regions.

The sand dunes are initially stabilised by marram grass and sea couch grass, enabling colonisation by sea poa grass, sand couch-grass, lyme-grass and grey hair-grass, which also help to bind the sand.

The site is generally rich in plants, especially those that can cope with saline environments, but three species appear to have been lost: divided sedge was last recorded in 1999, grey hair-grass in 1982 and lax-flowered sea lavender in 1977.

Grey Hair-grass (Corynephorus canescens)

The larvae feed on various Poaceae species, including Corynephorus canescens, Carex arenaria and Molinia caerulea.