Definition of "tussock"

An Indian grazing ground is all rocks and scrub and tussocks and little ravines, among which the herds scatter and disappear.

1894 May, Rudyard Kipling, The Jungle Book, London, New York, N.Y.: Macmillan and Co., published June 1894

Next morning I was off to Lochtully, which, as you know, is in the north of Perthshire. It stands three miles from the station, a great gray pinnacled house, with two towers cocking out above the fir woods, like a hare’s ears from a tussock of grass.

1895, A[rthur] Conan Doyle, The Stark Munro Letters: […], London: Longmans, Green, and Co.