ALLERGY AND ASTHMA IN THE SOUTHWESTERN UNITED
STATES
Ash trees develop unattractive flowers in the spring
- photo of Fraxinus velutina 'Rio Grande' February 19

See flowers develop in photos of the same tree taken February
23, March 2 and March 3. Deciduous trees in Southern Arizona
flower earlier than in colder climates. Note that the flowers develop faster than
the leaves.
Content Owner: Michael J. Schumacher, MB, FRACP
University of Arizona

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