Scientific
Name
Thuja occidentalis, Platycladusorientalis
Common Name
Arborvitae |
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Characteristics
 ID
hints- "American arborvitae"
- Branchlets in flat plane**
- - Twigs 2-ranked
- - Spray often fan-shaped**
- Leaves scale-like**
- - leaves 4-ranked forming twig
- - Blister-like gland near apex***
- Cones commonly absent most cultivars
- - Female cone ellipsoidal*
- - Scales brown, lack umbo
- "eastern arborvitae" (Platycladus)
- Leaves with slit-like gland near apex*
- - Crusty ooze in cold weather
- - Leaves scale-like**
- Female cones commonly present
- - Female cone subglobal
- - Scales gray, curved umbo present***
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"American arborvitae"
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"American arborvitae"
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"American arborvitae"
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"American arborvitae"
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"American arborvitae"
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"Eastern arborvitae"
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"Eastern arborvitae"
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"Eastern arborvitae"
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"Eastern arborvitae" on left,
"American Arborvitae" on right
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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.
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