Ocotillo is the bane of my existence. After I needled the U.S. Postal Service for using a plant not indigenous to Nevada on the new Nevada Flag stamp, it turns out you can find ocotillo growing ...

Maybe you’ve seen an ocotillo out in nature. Driving down 385 toward Big Bend National Park, the plants are hard to miss, with their sprawling branches snaking their way toward the sky. The ...

Our ever-evolving palette of spring color has arrived at a new hue: red. As the season of yellow continues on some hillsides and neighborhoods cloaked with palo verde color, several kinds of cactus ...

Just as many wildflowers are beginning to fade, cactus blooms are showing up a bit early to keep deserts around Tucson colorful. Among the early bloomers are red and yellow cholla cactus flowers — ...

Veteran desert biologist Jim Cornett was astonished to see a bright yellow and black caterpillar munching on a spiny ocotillo plant one late March day. Normally the razor-spiked plants would not be ...