ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Centaurea dubia
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    ASTERALES
 FAMILY:   ASTERACEAE
 SCIENTIFIC NAME:  Centaurea dubia
 AUTHORITY:  Suter
 
 COMMON NAMES:
    TYROL KNAPWEED
 
 SYNONOMY:
     Centaurea transalpina
 
 PLANTS CODE: CETRG
 
 NATURAL COMMUNITIES:
     CULTURAL
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 COUNTIES:
   DUPAGE          GALLATIN        KANE            LAKE            STEPHENSON
 
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMY COMMENTS:
     Illinois plants are of subspecies vochinensis (Bernh.) Heyek.
 
 TAXONOMIC CHARACTERISTICS:
    ROOTS:  Adventitious   (fibrous)
    LEAF ARRANGEMENT:   Alternate
    LEAF TYPE:   Simple
    LEAF MARGIN:   Entire   Serrate   Lobed  (pinnately)
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Lanceolate
    INFLORESCENCE:   Head
    FLOWER STRUCTURE:   Incomplete   Regular   Irregular
    FLOWER PLACEMENT:  Epigynous
    FRUIT:   Achene
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  Europe
 
 GEOGRAPHIC COMMENTS:
     Species is found in DuPage, Gallatin, Lake, and Stephenson counties.
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Rare
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Perennial
     REPRODUCTION:   Sexual
     FLOWERING PERIOD:
         MONTH BEGINNING-      7         MONTH END-      9
     TROPHIC STATUS:  Autotrophic
     SEX:      Perfect
 
 ECODISTRIBUTION COMMENTS:
     Species is distributed on waste ground.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:    No data entered
 HUMAN RELATIONSHIP DATA:    No data entered
 
 WILDLIFE AND LIVESTOCK INFORMATION:   No data entered
 
 REVEGETATION PLANTINGS:    No data entered
 
 
 REFERENCES:
Mohlenbrock, R. H., ed.  1975.  Guide to the vascular flora of Illinois.
     Southern Illinois University Press, Carbondale.  494 pp.
 
 END OF DATA FOR SPECIES  Centaurea dubia
 
 ------------------------------------------------------------------------
 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