A genus of evergreen, coniferous trees in which the leaves are small, and closely adpressed to the flattened twigs. The cones have 3 or 4 pairs of scales, only the middle ones being fertile and bearing paired seeds. T. plicata is western red cedar, with weather-resistant timber that is used for shingles, green-houses, etc. All members of the genus are known as arbor vitae. There are 5 species, occurring in eastern Asia and N. America.
Subjects: Plant Sciences and Forestry.