1. BOTANICAL NAME
THUJA OCCIDENTALIS

2. PRONUNCIATION
Thew - yah ok - si - den -TALE - is

3. COMMON NAME
American Arbovitae

5. FAMILY
Cupressaceae

6. CLASSIFICATION
Tree or Shrub- dependent on variety

7. Growth Habit
Evergreen
Height 5’ - 60’
Width 5’ - 15’
Upright

8. LEAF
Scale-like
Length 1/8”
Width 2/3 of length

10. ARRANGEMENT
Scales

11. MARGIN
Scales

12. VEINS

15. FLOWER
Spring
Not noticeable

16. FRUIT
Green with no hooks

17. Thuja occidentalis fruit above and Thuja orientalis fruit to the left.

18. EXPOSURE
Sun

19. USE
Specimen
Foundation

20. DESCRIPTION Usually has a single main stem
Small scale like leaves hugging the twigs; abruptly pointed

21. DESCRIPTION Branchlets flat but turned every direction
Green (flat) in summer; yellowish brown in winter

22. DESCRIPTION
Thuja may have “blisters” on back side of most recently matured stem - not so on Pladyclatus and Cupressocyparis

23. CULTURAL PRACTICES
Prune prior to growth in the Spring

24. PROBLEMS
Bag worms

25. ZONES
2 - 8

26. NATIVE OF:
Eastern North America