Scientists discover that fast-changing cactus flowers, not size or pollinators, are behind the rapid evolution of new cactus species.

Celebrate National Cactus Day by meeting the pioneering botanist, Joseph Nelson Rose Jack Tamisiea As the largest species of cactus in the United States, saguaro cactuses usually grow around 40 feet ...

Cacti are a type of plant that is known for its thick, fleshy stem and its spines. These plants are native to the deserts of North and South America, and have adapted to the dry, hot climate by ...