UA logo Allergy and Asthma in the
Southwestern United States
Information for patients with allergy and related problems
in the Southwest

Environment and allergic disease                Return to menu

Key to Plant Identity for Patients with Allergy

Allergenic Weeds (click on hypertext links for pictures)

Herbaceous plant/weed
  
numerous burs that stick
     -  gray green triangular leaves,
                perennial with woody stems .
................................ Triangle Leaf Bursage
     -  very long leaves, serrated edges ...................................  Canyon Ragweed
     -  leaves 3/4 in long with divisions, spiky burs 1/3 in long,
                low mounded shrub 2 ft high ................................   Desert Ragweed
    small narrow leaves, spiky, dries to a tumbleweed ..............  Russian Thistle
    tall (1-6 ft), leaves with smooth edges, inconspicuous
                flowers on long branching spikes............................ Carelessweed
    gray-green irregularly shaped leaves, silvery scales,
                inconspicuous flowers at base of leaves  ............... Wheelscale Saltbush                                                                                             Four-Wing Saltbush
    pale green, indented leaves, small greenish flowers at ends
                of stem branches..................................................  Lambsquarters 
    very large ( 1/2-1 inch) burs, grows in ditches and
                near streams .......................................................  Cocklebur

   

    Key to Trees and Shrubs
    Key to Grasses                                                                        
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Disclaimer:   This site is for educational purposes only.  Any information that you have found in this web site is not intended to replace medical care or advice given to you by your own physicians. You should consider consulting your local medical library and other web sites for additional information. 

Comments and suggestions welcome!   Email: schumach@u.arizona.edu
Content Owner:  Michael J. Schumacher, MB, FRACP, The University of Arizona

Updated 8/2008