American viburnum; a genus of the angiopteris order, belonging to the didynamia class of plants. There are seven species, consisting of shrubby exotics from Africa and America for the green-house or stove; growing to the height of a yard or two, and adorned with oblong, oval, and roundish simple leaves, with monopetalous, tubular, four-parted flowers of different colours.—They may be propagated by seeds or cuttings.