Winterberry, Ilex verticillata, is clearly not a wildflower. It is a native plant that is known as a swamp plant which means it is very happy in our garden. It does not need full sun which is another blessing. The thing to remember is  that winterberries are dioecious (separate male and female plants). Only fertilized female flowers will produce the attractive red berries that are the signature of the species. The white spring blossoms are very  tiny and…