Tourists come to the Casa Grande Ruins to see the remnants of an ancient culture. They are equally impressed by the incredible vegetation like this blooming cactus. The Flora Project estimates there are 2,400 species of plants in the Sonoran Desert Network. About 160 of them are represented at Casa Grande. Botany enthusiasts will want to download an online field guide published by the National Park Service called, “Plants of Casa Grande Ruins National Monument.”
