A Texas hiker who stumbles on a once-in-a-lifetime rare cactus in the desert is not just finding a botanical curiosity, but ...

It's found in the U.S. exclusively in the Big Bend region of West Texas.

Desert Botanical Garden serves as national rescue center for rare and endangered cacti Steve Blackwell, the Conservation Collections Manager, oversees the collection of rare and endangered plants, ...

A rare tree cactus that grew for decades hidden by a tangle of mangrove trees on Florida's Key Largo has lost its battle with rising sea levels and other pressures. It's now considered locally extinct ...

As out-of-control heat cooks our planet, shattering temperature records for the last 13 consecutive months, it melts polar ice and raises sea levels. Most people are familiar with how this works, but ...

University of Cincinnati student Olivia Leek is showing me a small, prickly plant in a plastic bag. "My favorite specimen is just kind of silly; doesn't really have a deep backstory to it," she ...