in botany: A genus of the angiospermia order, belonging to the didynamia class of plants; and in the natural method ranking under the 40th order, Perforatae. The calyx is quinque-partite; the upper lip of the corolla arched and entire; gibbous above the base; the antherae convex; the capsule bilocular. There is but one species, a native of Martinico, of which we have no particular description.