3 plants and a specific adaptation for survival for each plant

Three plants I've seen today are: the elephant tree, a saguaro, and a desert sage. These plants  have special adaptations that allow them to live in these extreme desert climates. The elephant tree has long trunks that allow them to store water for days. The saguaro uses thorns to protect itself from predators. Also, the saguaro's flowers self pollinate very easily, ensuring that the cactus does not have to worry about extinction. The desert sage's adaption is that it does not need water at all; it can survive drought very well. Instead, it conserves solar energy instead of water like most plants.