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Grass

Family: Poaceae (Gramineae)

Size  22 - 122 um
Shape  spheroidal to ovoidal
Exine 1 - 1.5 um thick
Intine  1.5 - 5 um thick
Pores 1 pore, can have annulus
Sculpting  finely reticulated
Bloom Period  some in spring and fall, most mid summer
Allergenicity  severely allergenic, second to ragweed in late summer

Thumbnails:
        
                Quack Grass                             Reed Canary Grass

        
            Blue Gramma Grass                 Side Oats Gramma Grass
         
        
            Canada Wild Rye                                Timothy Grass

Dr. M. Davis images:
orchard grass          Ribgrass          wild rice

References:

Bassett, John, Clifford Crompton and John Parmelee.  An Atlas of Airborne Pollen Grains and Common Fungus Spores of Canada.  Canada Department of Agriculture, 1978. 

Jelks, Mary, M.D.  Allergy Plants that Cause Sneezing and Wheezing.  World Wide Printing, Tampa, 1986. 

Kapp, Ronald O.  Pollen and Spores, Second Edition.  The American Association of Stratigraphic Palynologists Foundation, 2000. 

Lewis, Walter H., Prathibha Vinay and Vincent E. Zenger.  Airborne and Allergenic Pollen of North America.  The Johns Hopkins University Press, Baltimore and London, 1983. 


page created by: Brian Hoffman