ILLINOIS PLANT INFORMATION NETWORK
 
 ILPIN INFORMATION ON    Ambrosia trifida texana
 
 
 CLASS:    DICOTYLEDENAE
 ORDER:    ASTERALES
 FAMILY:   ASTERACEAE
 SCIENTIFIC NAME:  Ambrosia trifida texana
 AUTHORITY:  L.
 SUBSPECIFIC AUTHORITY: Scheele
 
 COMMON NAMES:
 NO SELECTED RECORDS IN THE SPECIFIED RANGE
 
 SYNONOMY:   None
 
 PLANTS CODE: AMTRT
 
 NATURAL COMMUNITIES:
     FOREST
       FLOODPLAIN FOREST
         MESIC
       THICKETS
     WETLAND
       BORDER OF LAKE
     CULTURAL
       AGRICULTURAL FIELD
       SUCCESSIONAL FIELD
       DEVELOPED LAND
 
 
 SAF FOREST COVER TYPE:
     NO
 
 NATURAL DIVISION:  UNAVAILABLE
 
 
 GROWTH FORM:  Dicot-herb
 
 TAXONOMY COMMENTS:
     SCS V.2 = Ambrosia aptera DC. - these two names have been used for
     the same plant by at least one source.
 
 TAXONOMIC CHARACTERISTICS:
    LEAF ARRANGEMENT:     Opposite
    LEAF TYPE:   Simple
    LEAF MARGIN:   Serrate   Lobed  (pinnately)
    LEAF VENATION:  Pinnate
    LEAF SHAPE:     Ovate
    INFLORESCENCE:   Raceme  Spike  Head
    FLOWER MEROUS:  5
    FLOWER STRUCTURE:   Incomplete  (no sepals)
    FLOWER COLOR:   Yellow   Green
    FLOWER PLACEMENT:  Epigynous
    FRUIT:   Achene
 
 DISTINGUISHING CHARACTERISTIC COMMENTS:
     The typical variety has: wingless petioles; fruits, mostly smaller and ribs
     of fruit ending in blunt or almost obsolete tubercles.
 
 GEOGRAPHIC INFORMATION:
     ORIGIN:   Introduced-  N. America
 
 GEOGRAPHIC COMMENTS:
     Adventive from S.W. USA.
 
 POPULATION DYNAMICS:
     STATE STATUS: Not listed
     FEDERAL STATUS: Not listed
     COMMONNESS:  Occasional
     ENDEMIC:   NOT-ENDEMIC
 
 BIOLOGIC:
     HABIT:   Forb
     LIFE CYCLE:   Annual
     FLOWERING PERIOD:
         MONTH BEGINNING-      7         MONTH END-     10
     TROPHIC STATUS:  Autotrophic
     SEX:      Unisexual   -monoecious
 
 ECODISTRIBUTION COMMENTS:
     Rich alluvial soils in sloughs, waste grounds, roadsides, along
     railroads.
 
 ENVIRONMENTAL RELATIONSHIPS:   No data entered
 
 FUNCTIONAL RELATIONSHIPS:
     MAJOR POLLINATION AGENT:   Wind
 
 HUMAN RELATIONSHIP DATA:
     ALLERGENIC:  Yes
 
 
 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.
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.
 
 END OF DATA FOR SPECIES  Ambrosia trifida texana
 
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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