AFRICAN BROOM: a genus of the decandria order, belonging to the diadelphia class of plants; and in the natural method ranking under the 32nd order, Papilionaceae. The calyx consists of 5 divisions: the pod is oval, and contains 2 seeds. Of this genus there are 19 species; all of which are natives of warm climates, and must be preserved in shades by those who would cultivate them here. The rootwood, whence the oleum rhodii is obtained, is one of the species, but of which we have yet had no particular description. The wood is heavy, oleaginous, somewhat sharp and bitter to the taste, of a strong smell and purple colour. It is called rose-wood or lignum Rhodium, either on account of its sweet smell, or of its growth in the island of Rhodes. It was anciently in much repute as an astringent, strengthening, and drier; but it is now used in internal practice. It affords an oil of an admirable scent, reputed one of the best of perfumes: it is chiefly used in scenting pomatums and liniments.