ALLERGY AND ASTHMA IN THE SOUTHWESTERN UNITED STATES 

6-weeks grama grass image
Illustrations by Lucretia Breazeale Hamilton, from
An Illustrated Guide to Arizona Weeds, by Kittie F Parker.
Copyright 1972 by the Arizona Board of Regents.  Reprinted by Permission.  These illustrations may not be reproduced or downloaded without the express permission of the University of Arizona Press
AHSC logoFlowering period in Southern Arizona: May-October.  Several native species of Bouteloua in the region.  A common urban and rural weed.
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