RHOPOLA, in botany: A genus of the monogynia order, belonging to the tetrandria class of plants; and in the natural method ranking with those that are doubtful. There is no calyx; the petals are four, oblong, obtuse, and narrowing at the base; the staminal are four, inserted in the corolla, and have large anthers; the seed-vessel unilocular, and contains one seed. There is only one species, viz. the montana. This is a shrubby plant growing in Guiana, and remarkable for the great number of branches sent off from its trunk in every direction, and for the fetid smell of the wood and bark of this plant.