Vinca. minor - Family, Dogbane. Color, blue. Parts of the flower in fives. Calyx and corolla, tubular; limb of the corolla, salver-form. Stamens, joined to the corolla. Smooth, prostrate plants, represented in the tropics by shrubs or trees, generally poisonous plants. Leaves, opposite, thick, shining, evergreen. Flowers, single, in the axils, peduncled. February to May.