|Size||19 - 56 by 18 - 48|
|Shape||suboblate-spheroidal to prolate|
|Exine||1 - 1.5 um thick|
|Intine||.5 um, thicker under apertures|
|Pores/furrows||3 or 4 colporate, round pores exceed furrow margins, furrows slender and long|
|Bloom Period||May to September|
|Allergenicity||may be allergenic during time of grass pollination|
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.
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