Santa Catalina Mountains Coronado NF AZ / FEB A Palo Verde tree serves as a nurse tree for a pair of young saguaro cacti in Pima Canyon.

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Photo credit: © Randy Prentice / Alamy / Afripics
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Keywords: arizona, az, cactus, canyon, catalina, desert, forest, mountains, nurse, palo, pima, santa, tree, trees, tucson, verde