SPERMACOCE, button-wood, in botany: A genus of plants belonging to the class of tetrandria, and order of monogynia; and in the natural system arranged under the 47th order, stellata. The corolla is monopetalous and funnel-shaped, and there are two bidentate seeds. The species are eight, tenuior, verticillata, hirta, articularis, stricta, hispida, procumbens, and spinosa.