Barrel cactus look a lot like a spiny barrel. No surprise, right? But you might be surprised at how beautiful the flowers are. Yellow and orange are the most common colors, pink and red less frequent. But whatever the color, the flowers only bloom on top of the cactus. Barrel cactus are usually about 3′ or less, although some have been found as tall as 9′. Whatever the height, they can live to be 100 years old.

Fun fact, courtesy of Wikipedia:
Barrel cactus can fall over because they grow based on sun orientation. They usually grow towards the south to prevent surface tissue sunburn, giving the name “compass cactus.”
And here’s my favorite cactus quote:
I bought a cactus. A week later it died. And I got depressed, because I thought, D**n. I am less nurturing than a desert. ~Demetri Martin
As with all cactus, admire the flowers, but don’t forget the spines!
