SCORPION-GRASS; a genus of the monogyne order, belonging to the pentandria class of plants. There are four species; of which the most remarkable is the scorpioides, or mouse-ear. This is a native of Britain, growing naturally in dry fields, and on the margins of springs and rills. It hath naked seeds, and the points of the leaves callous. It varies considerably in different situations. In dry places the plant and flowers are smaller; in moist ones both are larger, and sometimes hairy. The blossoms vary from a full blue to a very pale one, and sometimes a yellow; and appear in a long spirally twisted spike. When it grows in the water, and its taste and smell is thereby rendered less observable, sheep will sometimes eat it; but it is generally fatal to them. Cows, horses, swine, and goats, refuse it.