MARE'S-TAIL: A genus of the monogynia order, belonging to the monandria class of plants; and in the natural method ranking under the 15th order, Inundata. There is no calyx, nor any petals; the stigma is simple; and there is one seed. There is only one species, a native of Britain, and which grows in ditches and stagnant waters. The flower of this plant is found at the base of each leaf, and is as simple as can be conceived; there being neither empalement nor blossom; and only one chive, one pointal, and one seed. It is a very weak attri-

gent. Goats eat it; cows, sheep, horses, and swine, refuse it.