Winterberry holly (Ilex verticillata) is a native shrub that adds color to the winter garden. The delightful berries appear late fall and last through mid-winter, attracting birds to the landscape. Branches of mature plants can be cut and used in arrangements and for other holiday décor. A note about winterberry holly pollination: winterberry holly plants are either male or female, and both a male and female plant need to be present in order for fruit to form on the female.