lorax

Dragon fruit are cactus fruit.

Down here, there are three classes of cactus fruit - Pitahaya (Dragonfruit), Tuna (Prickly Pears, white or red flesh), and San Pedritos (fruit of the San Pedro cactus). And then there's Nopales but this is actually the cooked fleshy leaves of Prickly pear, not a fruit.

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I speak for the trees.