Evergreen shrubs are plants that remain green and retain their foliage throughout the year. Ericas, OLEA, and Yews are all examples of evergreen shrubs. Ericas are a genus of flowering plants in the family Ericaceae, which includes heathers, rhododendrons, and blueberries. OLEA is a genus of evergreen trees and shrubs in the family Oleaceae, which includes olive trees. Yews are a genus of coniferous trees in the family Taxaceae, which includes junipers and cedars.