ID hints Left: "eastern arborvitae" Female cones commonly present - Female cone subglobal - Scales gray, curved umbo present*** Right: "American arborvitae" Cones commonly absent most cultivars - Female cone ellipsoidal*

Platycladus orientalis (on left), Thuja occidentalis (on right), Arborvitae

4-H Horticulture Contest, Dr. Alice B. Russell, Dr. Paul R. Fantz, and Larry Bass, Department of Horticultural Science, NC Cooperative Extension Service, NC State University. All Pictures Copyright @1997Alice B. Russell. Computer programming by Miguel A. Buendia, graphics by Brad Capel.