ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Amaranthus powellii
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    CARYOPHYLLALES
 FAMILY:   AMARANTHACEAE
 SCIENTIFIC NAME:  Amaranthus powellii
 AUTHORITY:  S. Wats.
 
 COMMON NAMES:
    SMOOTH PIGWEED
 
 SYNONOMY:   None
 
 PLANTS CODE: AMPO2
 
 NATURAL COMMUNITIES:
     CULTURAL
       AGRICULTURAL FIELD
         CROPLAND
         FIELD DIVISION
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   BOONE           CASS            CHAMPAIGN       COOK            DEKALB
   DUPAGE          GREENE          GRUNDY          IROQUOIS        JACKSON
   KANE            KANKAKEE        KENDALL         LAKE            MCHENRY
   MACON           PEORIA          PIATT           WILL
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Primary
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Ovate
    INFLORESCENCE:   Panicle  Spike
    FLOWER STRUCTURE:   Incomplete  (no petals)
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Achene
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  N. America
 
 GEOGRAPHIC COMMENTS:
     Native of the southwestern U.S.
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Occasional
     ENDEMIC:   NOT-ENDEMIC
 POPULATION STATUS COMMENTS:
     To common northward.
 
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Annual
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      7         MONTH END-     10
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C4
     SEX:      Unisexual   -monoecious
 
 ECODISTRIBUTION COMMENTS:
     Waste ground, along railroads.
 
 ENVIRONMENTAL RELATIONSHIPS:
     GROWTH OF SPECIES IN VARIOUS CONDITIONS:  No data entered
 
     HABITAT:   Dry
 
 FUNCTIONAL RELATIONSHIPS:
     MYCORRHIZAE:   no
 
 HUMAN RELATIONSHIP DATA:
     ALLERGENIC:  Maybe
     EDIBLE:  Yes-qualified
     SHOWY FLOWERS:  YES      AMOUNT:  Low
     LANDSCAPING:  NO
 
 HUMAN FACTOR COMMENTS:
     May cause hayfever.
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 REVEGETATION PLANTINGS:
     WEEDINESS:   Economic
 
 
 GENERAL COMMENTS:
     Listed as non-weedy in PIN.
 
 
 REFERENCES:
Mohlenbrock, R. H., ed.  1975.  Guide to the vascular flora of Illinois.
     Southern Illinois University Press, Carbondale.  494 pp.
Jones, G. N.  1963.  Flora of Illinois.  Third ed.  American Midland Naturalist
     Monograph 7.  University of Notre Dame, Indiana.  401 pp.
Steyermark, J. A.  1963.  Flora of Missouri.  Iowa State University Press, Ames.
     1725 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.
Agricultural Experiment Station.  1981.  Weeds of the North Central States.
     Bulletin 772.  College of Agriculture, University of Illinois at Urbana-
     Champaign, Urbana.  303 pp.
Downton, W. J. S.  1975.  The occurrence of C4 photosynthesis among plants.
     Photosynthetica 9(1): 96-105.
 
 END OF DATA FOR SPECIES  Amaranthus powellii
 
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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