ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Polygonum arenastrum
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    POLYGONALES
 FAMILY:   POLYGONACEAE
 SCIENTIFIC NAME:  Polygonum arenastrum
 AUTHORITY:  Boreau
 
 COMMON NAMES:
    KNOTWEED
 
 SYNONOMY:   None
 
 PLANTS CODE: POAR11
 
 NO NATURAL COMMUNITY INFORMATION
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   ADAMS           ALEXANDER       BOND            BOONE           BROWN
   BUREAU          CALHOUN         CARROLL         CASS            CHAMPAIGN
   CHRISTIAN       CLARK           CLAY            CLINTON         COLES
   COOK            CRAWFORD        CUMBERLAND      DEKALB          DEWITT
   DOUGLAS         DUPAGE          EDGAR           EDWARDS         EFFINGHAM
   FAYETTE         FORD            FRANKLIN        FULTON          GALLATIN
   GREENE          GRUNDY          HAMILTON        HANCOCK         HARDIN
   HENDERSON       HENRY           IROQUOIS        JACKSON         JASPER
   JEFFERSON       JERSEY          JO DAVIESS      JOHNSON         KANE
   KANKAKEE        KENDALL         KNOX            LAKE            LASALLE
   LAWRENCE        LEE             LIVINGSTON      LOGAN           MCDONOUGH
   MCHENRY         MCLEAN          MACON           MACOUPIN        MADISON
   MARION          MARSHALL        MASON           MASSAC          MENARD
   MERCER          MONROE          MONTGOMERY      MORGAN          MOULTRIE
   OGLE            PEORIA          PERRY           PIATT           PIKE
   POPE            PULASKI         PUTNAM          RANDOLPH        RICHLAND
   ROCK ISLAND     ST. CLAIR       SALINE          SANGAMON        SCHUYLER
   SCOTT           SHELBY          STARK           STEPHENSON      TAZEWELL
   UNION           VERMILION       WABASH          WARREN          WASHINGTON
   WAYNE           WHITE           WHITESIDE       WILL            WILLIAMSON
   WINNEBAGO       WOODFORD
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Primary
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Oblong     Oval
    INFLORESCENCE:   Raceme
    FLOWER MEROUS:  5
    FLOWER STRUCTURE:   Incomplete  (no petals)   Regular
    FLOWER COLOR:   Red   Green   White
    FLOWER PLACEMENT:  Hypogynous
    FRUIT:   Achene
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  Europe   Asia
 
 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-      6         MONTH END-     11
     TROPHIC STATUS:  Autotrophic
     C02 FIXATION:  C3
     SEX:      Perfect
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:    No data entered
 
 WILDLIFE AND LIVESTOCK INFORMATION:
     FOOD VALUE:  No data entered
     COVER VALUE:  No data entered
 
 LIVESTOCK PALATABILITY DATA:
     CATTLE FORAGE: No data    SHEEP FORAGE:  No data    HORSE FORAGE:  No data
     GOAT FORAGE:   No data    ENERGY VALUE:  No data    PROTEIN VALUE: No data
     POISONOUS (LIVESTOCK):   Suspect
 
 REVEGETATION PLANTINGS:    No data entered
 
 
 REFERENCES:
Mohlenbrock, R. H.  1967-continuing.  The illustrated flora of Illinois.
     Southern Illinois University Press, Carbondale.
Kingsbury, J. M.  1964.  Poisonous plants of the United States and Canada.
     Prentice-Hall, Inc., Englewood Cliffs, New Jersey.  626 pp.
 
 END OF DATA FOR SPECIES  Polygonum arenastrum
 
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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