ALLERGY AND ASTHMA IN THE SOUTHWESTERN UNITED STATES 

Ash tree flowering in the spring
- close-up photo of Fraxinus velutina 'Rio Grande' February 23

Arizona Ash flowers

See photos of the same tree taken  March 2 and March 3

Content Owner:  Michael J. Schumacher, MB, FRACP  
                            University of Arizona  
AHSC logo
Back to Table of tree pictures             Back to Pollen page