A cactus is listed for $250,000 on its website. It's a plant called haageocereus tenuis, critically endangered plant that we acquired from a researcher who spent most of his life studying rare ...

Explore the rugged terrain and rare plants at one of Arizona's newest and barely visited national monuments, a serene cactus forest in the middle of the desert.

Experts have documented the “first local extinction” of plant species driven by rising sea levels in the United States. The Key Largo tree cactus, at over 20 feet tall, was once a beautiful ...