Evergreen holly of eastern North America with oblong leathery leaves and small black berries WordNet 3.0 & Open English WordNet

Gallberry is a common name for two similar shrubs in the Holly family. Wikipedia

Ilex glabra, also known as Appalachian tea, dye-leaves, evergreen winterberry, gallberry, and inkberry, is a species of evergreen holly native to the coastal plain of eastern North America, from coastal Nova Scotia to Florida and west to Louisiana where it is most commonly found in sandy woods and peripheries of swamps and bogs. Wikipedia

Ilex glabra (winterberry, gallberry). Wiktionary