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Prickly pear growing on saguaro

The fruits of the Devil’s Claw are maturing, long, curved, green and hairy. Also the gourds on the Finger-leaved Gourd. I haven’t seen any Coyote Melon, which often get confused with these two. Saw a Phainopepla and an Anna’s Hummingbird on the walk yesterday.

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About Bill McCallum

I was born in Australia and came to the United States to pursue a Ph. D. in mathematics at Harvard University, met my wife, and never went back. I am a professor at the University of Arizona, working in number theory and mathematics education.


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