Noun | 1. | ![]() gymnosperm genus - a genus of gymnosperms canoe cedar, red cedar, Thuja plicata, western red cedar - large valuable arborvitae of northwestern United States American arborvitae, northern white cedar, Thuja occidentalis, white cedar - small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets Oriental arborvitae, Platycladus orientalis, Thuja orientalis - Asiatic shrub or small tree widely planted in United States and Europe; in some classifications assigned to its own genus |