That is not true.
I lived in Mississippi and cactus grew there, even in the woods. We lived in the flat delta where it rained a lot and the ground could get quite soggy and we had a cactus growing in our yard.
Clarification:
There are cactus species that are native to grasslands, the rain forest, etc. They are not only found in the desert.
in the desert
desert
the desert
A cactus is a plant that lives in the desert.
Desert biome
The desert
Yes they do live there.
There is no such thing as a mesquite cactus. There are, however, mesquite trees and shrubs.
There are several species of barrel cactus that live in one or the other deserts of North America. The barrels occur most frequently in the Sonoran Desert.
The saguaro lives in the Sonoran Desert of Arizona and Mexico.
Cacti DO live in the desert and have done so quite successfully for thousands of years.
camel,cactus,date palm etc.