VIBURNUM, in botany; a genus of plants of the class pentandria, order trigynia, and in the natural system arranged under the 43d order, diurica. The calyx is quinquepartite and above; the corolla divided into five laciniæ; the fruit a monospermous berry. There are 19 species; two of which, the lantana and opulus, are natives of Britain. 1. The lantana, common viburnum, wayfaring, or plant meally trees, rises with a woody stem, branching twenty feet high, having very pliant shoots covered with a lightish-brown bark; large heart-shaped, veined, serrated leaves, white and hoary underneath; and the branches terminated by umbels of white flowers, succeeded by bunches of red berries, &c. 2. The opulus, or gelder-rose; consisting of two varieties, one with flat flowers, the other globular. The former grows eighteen or twenty feet high, branching opposite, of an irregular growth, and covered with a whitish bark; large lobed or three-lobed leaves on glandulose foot-stalks, and large flat umbels of white flowers at the ends of the branches, succeeded by red berries. The latter grows fifteen