HYDROPHYLLUM, WATER-LEAF; a genus of the monogynia order, belonging to the pentandria class of plants. There is only one species, viz. the Virginianum, or water-leaf of Morinus. It grows naturally in Canada and many other parts of America on moist spongy ground. The root is composed of many strong fleshy fibres, from which arise many leaves with footstalks five or six inches long, jagged into three, five, or seven lobes, almost to the midrib, indented on their edges. The flowers are produced in loose clusters hanging downward, are bell-shaped, and of a dirty white colour. It may be propagated by parting the roots; which ought to be done in autumn, that the plants may be well rooted before spring, otherwise they will require a great deal of water.