Lone sunflower growing along a wash

What a pleasant surprise to find this sunflower blooming near the wash. I didn't know that sunflowers would could grow in Tucson without some supplemental water, but this one seems to be doing quite well. Although it probably won't get very tall, the growing conditions must be just right. It probably got planted from bird droppings. I think I'll throw a few sunflower seeds in a corner of my yard next spring.

A sunflower!
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