ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Thuja occidentalis
 
 
 CLASS:    CONIFEROPSIDA
 ORDER:    CONIFERALES
 FAMILY:   CUPRESSACEAE
 SCIENTIFIC NAME:  Thuja occidentalis
 AUTHORITY:  L.
 
 COMMON NAMES:
    ARBOR VITAE
    WHITE CEDAR
 
 SYNONOMY:   None
 
 PLANTS CODE: THOC2
 
 NATURAL COMMUNITIES:
     WETLAND
       BOG
         FORESTED
       FEN
         FORESTED
       SEEP & SPRING
       LISTED
         DOMINANT
     PRIMARY
       BLUFF
         CLIFF (ROCKY BLUFF)
           SANDSTONE
           LIMESTONE
     CULTURAL
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NORTHERN
        Spruce-Fir
           listed
           Northern White Cedar
     BOREAL
        Boreal conifers
        listed
        Tamarack
 
 
 NATURAL DIVISION:
     Northeastern Morainal
        Morainal
        Lake Michigan Dunes
     Grand Prairie
        Grand Prairie
 
 COUNTIES:
   COOK            KANE            LAKE            LASALLE         WILL
 
 
 GROWTH FORM:  Conifer
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Primary
    LEAF ARRANGEMENT:     Opposite
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF SHAPE:       Other
    FRUIT:   No
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     scale-like leaves, female cones are oblong-ovoid and 1/3-1/2 in.
     long(lcm); pale shreddy bark
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Native
 
 POPULATION DYNAMICS:
     STATE STATUS: Threatened-ST
     FEDERAL STATUS: Not listed
     COMMONNESS:  Uncommon
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Tree
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Sexual   Vegetative
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Unisexual   -monoecious
 
 ENVIRONMENTAL RELATIONSHIPS:
     GROWTH OF SPECIES IN VARIOUS CONDITIONS:
          GRAVEL         No data entered    SAND           No data entered
          SANDY LOAM     No data entered    LOAM           No data entered
          CLAY LOAM      No data entered    CLAY           No data entered
          DENSE CLAY     No data entered    ORGANIC SOIL   No data entered
          NEUTRAL pH     Good               ACIDIC SOIL    No data entered
          EXTREMELY ACID No data entered    SALINE SOIL    No data entered
          SODIC SOIL     No data entered    SODIC-SALINE   No data entered
          ROCKY OUTCROPS Good               GENTLE SLOPES  No data entered
          MODERATE SLOPE No data entered    STEEP SLOPES   No data entered
     HABITAT:   Wet   Moist
 
 ENVIRONMENTAL RELATIONS COMMENTS:
     well-decomposed organic soil, slightly alkaline
 
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:
     SHOWY FLOWERS:  NO     LANDSCAPING:  YES     AMOUNT:   High
 
 WILDLIFE AND LIVESTOCK INFORMATION:
     FOOD VALUE:
         DEER VALUE:    Good   -   Leaves   Stems   Buds
         UPLAND GAME VALUE:  Unknown
         WATERFOWL VALUE:  Unknown
         SMALL NON-GAME BIRD VALUE:  Unknown
         SMALL MAMMAL VALUE:  Unknown
         AQUATIC MAMMAL VALUE:  Unknown
         FISH VALUE:  Unknown
     COVER VALUE:  No data entered
 
 LIVESTOCK PALATABILITY DATA:  No data entered
 
 REVEGETATION PLANTINGS:
     WEEDINESS:   COLONIZING
 
 
 GENERAL COMMENTS:
     Invades speckled adler thickets following changes in water level or
     wildfire;  seeds on burned organic soil;  shade tolerant.
 
 
 REFERENCES:
Jones, G. N.  1963.  Flora of Illinois.  Third ed.  American Midland Naturalist
     Monograph 7.  University of Notre Dame, Indiana.  401 pp.
Gleason, H. A., and A. Cronquist.  1963.  Manual of vascular plants of north-
     eastern United States and adjacent Canada.  Van Nostrand Reinhold Co.,
     New York.  810 pp.
Fernald, M. L.  1950.  Gray's manual of botany.  8th ed.  American Book Co.,
     New York.  1632 pp.
Swink, F., and G. S. Wilhelm.  1979.  Plants of the Chicago region.  Third ed.
     The Morton Arboretum, Lisle, Illinois.  922 pp.
Eyre, F. H., ed.  1980.  Forest cover types of the United States and Canada.
     Society of American Foresters (SAF), Washington, D.C., 148 pp.
Schwegman, J. E., G. D. Fell, M. Hutchison, G. Paulson, W. M. Shepherd, and
     J. White.  1973.  Comprehensive plan for the Illinois Nature Preserves
     System.  Part 2 - The Natural Divisions of Illinois.  Illinois Nature
     Preserves Commission, Springfield.  32 pp., plus map.
White, J., and M. H. Madany.  1978.  Classification of natural communities in
     Illinois.  Pages 309-405 in J. White, ed., Illinois natural areas
     inventory technical report.  Vol. 1.  Survey methods and results.
     Illinois Natural Areas Inventory, Urbana.
Miller, R. B., and L. R. Tehon.  1929.  The native and naturalized trees of
     Illinois.  Illinois Natural History Survey Bulletin 18: 1-340.
Downton, W. J. S.  1975.  The occurrence of C4 photosynthesis among plants.
     Photosynthetica 9(1): 96-105.
 
 END OF DATA FOR SPECIES  Thuja occidentalis
 
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 ILPIN was developed by Louis Iverson*, with data compiled by David Ketzner and Jeanne Karnes
 Illinois Natural History Survey, 607 E. Peabody Dr., Champaign, IL 61820
     *currently employed by USDA Forest Service, 359 Main Rd., Delaware, OH 43015