STEWARTIA, in botany: A genus of plants belonging to the class of monadelphia, and order of polyandria; and in the natural system ranging under the 37th order, Columnifera. The calyx is simple; the style is simple, with a quinquelifid stigma; the apple is without juice, quinquelobed, monospermous, bursting open with a spring five ways. There is only one species, the maculodendron, which is a foreign plant.