ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Amaranthus hybridus
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    CARYOPHYLLALES
 FAMILY:   AMARANTHACEAE
 SCIENTIFIC NAME:  Amaranthus hybridus
 AUTHORITY:  L.
 
 COMMON NAMES:
    GREEN AMARANTH
    PIGWEED
 
 SYNONOMY:   None
 
 PLANTS CODE: AMHY
 
 NATURAL COMMUNITIES:
     CULTURAL
       AGRICULTURAL FIELD
         CROPLAND
         PASTURELAND
         FIELD DIVISION
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   ADAMS           ALEXANDER       BOND            BOONE           BROWN
   CALHOUN         CASS            CHAMPAIGN       CHRISTIAN       CLARK
   COLES           COOK            CRAWFORD        CUMBERLAND      DEKALB
   DEWITT          DOUGLAS         DUPAGE          EDGAR           EDWARDS
   FAYETTE         FULTON          GALLATIN        GREENE          GRUNDY
   HAMILTON        HANCOCK         HENDERSON       HENRY           IROQUOIS
   JACKSON         JEFFERSON       JERSEY          JOHNSON         KANE
   KANKAKEE        KENDALL         KNOX            LAKE            LAWRENCE
   LEE             LIVINGSTON      LOGAN           MCDONOUGH       MCHENRY
   MCLEAN          MACON           MACOUPIN        MARSHALL        MASON
   MASSAC          MENARD          MERCER          MONROE          MORGAN
   MOULTRIE        OGLE            PEORIA          PERRY           PIATT
   PIKE            POPE            PULASKI         RANDOLPH        ST. CLAIR
   SALINE          SANGAMON        SHELBY          STARK           STEPHENSON
   TAZEWELL        UNION           VERMILION       WABASH          WASHINGTON
   WHITE           WHITESIDE       WILL            WILLIAMSON      WOODFORD
 
 
 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 COLOR:   Green
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Achene
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  S. America
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Common
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Annual
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      8         MONTH END-     10
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C4
     SEX:      Unisexual   -monoecious
 
 ECODISTRIBUTION COMMENTS:
     Waste ground, farm lots, around dwellings, gardens, along railroads.
 
 ENVIRONMENTAL RELATIONSHIPS:
     GROWTH OF SPECIES IN VARIOUS CONDITIONS:  No data entered
 
     HABITAT:   Moist   Dry
 
 FUNCTIONAL RELATIONSHIPS:
     MYCORRHIZAE:   no
 
 HUMAN RELATIONSHIP DATA:
     ALLERGENIC:  Maybe
     EDIBLE:  Yes
     SHOWY FLOWERS:  YES      AMOUNT:  Low
     LANDSCAPING:  NO
 
 HUMAN FACTOR COMMENTS:
     May cause hayfever.
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 LIVESTOCK COMMENTS:
     Favorite pig plant.
 
 REVEGETATION PLANTINGS:
     WEEDINESS:   Economic
 
 
 REVEGATATION COMMENTS:
     Weediness- colonizing also.
 
 
 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 hybridus
 
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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