Ochna integerrima, popularly called the Vietnamese mickey-mouse plant (Vietnamese: hoa mai, hoàng mai, although these names also refer to Prunus mume), is a tree species (sometimes shrub) of the family Ochnaceae. The yellow flowers of this plant make it very popular in southern Vietnam, where the plant is purchased during Lunar New Year. In Vietnamese, the variety of O. integerrima whose flowers have five petals is called mai vàng (yellow mai), whereas mai núi (mountain mai) flowers have between five and nine petals.