large, barrel type cactus, typical, simple pink flower
There were a lot of these cacti in the Tatacoa desert. There were a lot of cacti actually but only about 4 unique species that I could see. Without my ID books at hand, I´m not of the the species of this one. I should be able to ID it once I get home. Maybe Echinocactus? This is the same type I have with my profile photo.