Tree. Leaves alternate, entire. Stipules 0. Inflorescences solitary or rarely fasciculate (branched from the very base), inserted on a tubercular basis. Calyx lobes 3(-4). Petals 3(-4), linear, entire, rarely laciniate. Stamens 6(-8). Ovary trigonous, cuneate to the base, lepidote, inferior, 3(-4)-celled, each cell with 2 ovules. Styles 3(-4), subulate, free. Fruit trigonous-fusiform, widely 3(-4)-winged, 1-celled, 2 cells aborted, 1-seeded. Seed narrow spindle-shaped (compressed in the herb, when not well developed), a solid whole, without a sharp demarcation between endosperm and embryo under the microscope; embryo obviously central and longitudinal, fusiform.