Hemlock trees in eastern forests are late successional tree species that provide shade for the forest understory. Globally, there are ten hemlock species, with populations located in Asia and eastern and western North America12. Eastern hemlock (Tsuga canadensis) and Carolina hemlock (Tsuga caroliniana) grow in the eastern U.S. These trees have great ecological and cultural value in forests. However, the invasive hemlock woolly adelgid (Adelges tsugae or HWA) is decimating hemlock populations throughout much of the trees’ native range, altering landscapes, and threatening these iconic tree species in both rural and urban areas.

Chinese (Ligustrum sinense), European (Ligustrum vulgare) and Japanese (Ligustrum japonicum) privets are all listed as invasive-exotic species that threaten native South Carolina forests. These are semi-evergreen, multi-stemmed shrubs or small trees that can grow up to a height of 20 feet. Ligustrum sp. are native to China, parts of Europe and Japan, and were first introduced into the United States around 1909 for ornamental use as shrub borders, erosion control plantings and wildlife forage. Characteristic flowers of Ligustrum species are showy, panicles of tiny, creamy-white flowers that are very fragrant and abundant in late spring through summer. Fruit produced are small, rounded dark-purple berries that persist throughout the winter, especially favored by birds.