<p>Close-up of green cactus skin with multiple spines growing from vertical rows of nodules.</p>
<p>Saguaro cactus, Saguaro National Park (Rincon Mountain District), Arizona</p>
<ul><li>Keywords: arizona; rincon mountain district; saguaro national park; saguaro cactus</li></ul>
Alice Wondrak-Biel
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