ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Iris pseudacorus
 
 
 CLASS:    MONOCOTYLEDENAE
 ORDER:    LILIALES
 FAMILY:   IRIDACEAE
 SCIENTIFIC NAME:  Iris pseudacorus
 AUTHORITY:  L.
 
 COMMON NAMES:
    WATER FLAG
    YELLOW FLAG IRIS
    YELLOW IRIS
 
 SYNONOMY:   None
 
 PLANTS CODE: IRPS
 
 NATURAL COMMUNITIES:
     WETLAND
       MARSH
       SWAMP
       SEEP & SPRING
         CALCAREOUS SEEP
       BORDER OF LAKE
     CULTURAL
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   CASS            CHAMPAIGN       COOK            DUPAGE          JACKSON
   KANE            KANKAKEE        KENDALL         LAKE            LASALLE
   MCHENRY         MACON           OGLE            PIATT           SANGAMON
   WILL
 
 GROWTH FORM:  Monocot
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Adventitious   (rhizomes)
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire
    LEAF VENATION:  Parallel
    LEAF SHAPE:     Linear   Oblong   Lanceolate
    INFLORESCENCE:   Solitary- few
    FLOWER MEROUS:  3
    FLOWER STRUCTURE:   Complete   Regular
    FLOWER COLOR:   Yellow   Others
    FLOWER PLACEMENT:  Epigynous
    FRUIT:   Capsule
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     This is a handsome and striking species with tall erect leaves a meter or
     more high. The tall stems bear the bright yellow flowers equal
     or shorter than the leaves.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  Europe
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Uncommon
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Sexual   Vegetative
     FLOWERING PERIOD:
         MONTH BEGINNING-      6         MONTH END-      8
     TROPHIC STATUS:  Autotrophic
     SEX:      Perfect
 
 ECODISTRIBUTION COMMENTS:
     Species is distributed in shallow waters; planted in
     gardens, often around pools or low wet ground. It is found
     especially along the Fox River in Kane co.; muddy calcareous springs.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:
     ALLERGENIC:  No
 
 
 HUMAN FACTOR COMMENTS:
     This species probably acts as a gastrointestinal irritant
     (Resinoids - Stephens).
 
 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
 
 LIVESTOCK COMMENTS:
     Species probably acts as a gastrointestinal irritant.
 
 REVEGETATION PLANTINGS:
     WEEDINESS:   Economic
 
 
 
 REFERENCES:
Mohlenbrock, R. H., ed.  1975.  Guide to the vascular flora of Illinois.
     Southern Illinois University Press, Carbondale.  494 pp.
Steyermark, J. A.  1963.  Flora of Missouri.  Iowa State University Press, Ames.
     1725 pp.
Gleason, H. A.  1952.  The new Britton and Brown illustrated flora of the
     northeastern United States and adjacent Canada.  3 vols.  The New York
     Botanical Garden, New York.
Kingsbury, J. M.  1964.  Poisonous plants of the United States and Canada.
     Prentice-Hall, Inc., Englewood Cliffs, New Jersey.  626 pp.
 
 OTHER REFERENCES:
     Stephens, H.A. 1980. Poisonous Plants of the Central United States.
          Regent Press of Kansas. Lawrence, KA. 165 pp.
 
 END OF DATA FOR SPECIES  Iris pseudacorus
 
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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