or Fox-tail Grass, in botany, a genus of the triandra digynia clasps. The calyx is bivalved, and the flower consists of one hollow valve, with a long awn inserted near the base on the back part. There are seven species of the alopecurus, viz., the pratensis, or meadow fox-tail grass; the bulbosus, or bulbofox-tail grass; the geniculatus, or flore fox-tail grass; and the myosuroides, or field fox-tail grass; the above four grow wild in Britain: the agrestis, the montpellicus, the panicus, and the hordeiformis, all natives of France, and the southern parts of Europe, except the last, which is a native of India.