Hair-grass (Aira) is a genus of grasses belonging to that division of the order in which the spikelets have two or more florets, and the inflorescence is a loose panicle. It is of little use for cattle, which dislike it, but may serve where covert is wanted for game. Aira coespitosa, or tufted hair-grass, the windiestrae of the Scotch, was formerly used as thatch for ricks, and in some places for making mats. Research Hair-Grass
Tussac Grass or tussock grass (Aira caespitosa, Festuca fllabellata and Dactylis coespitosa) is a large growing hardy perennialgrass of the order Gramineae native to the Falkland Islands, from where it was introduced to Scotland and other parts of Britain as a cattle food. It grows to a height of two metres with long tapering, leathery leaves, stout, smooth leafy stems and flowers borne in a plume-like cluster, many-branched bearing shining purplish spikelets. Research Tussac Grass