I just read “The Mountain Islands in the Desert Sea” (May 2021). It’s well-written and has nice photos, but the theme is grossly exaggerated. Sycamore Canyon is one of the best-documented local areas in Arizona: Botanists have visited and collected there for a century or so. In the SEINet database, there are 3,665 records of plant collections from within a 5-kilometer radius of Sycamore Canyon. Not so superficial, please.

Tom Van Devender,
director of biodiversity programs, Greater Good Charities
Tucson, Arizona

This article appeared in the print edition of the magazine with the headline Atascosa Highlands.

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