Large plants:

* Cacti: Some cactus species can grow to be very large, like the saguaro cactus, which can reach heights of 40-60 feet.

* Trees: While not as common as in other biomes, some desert trees can grow to be quite large, like Joshua trees and mesquite trees.

Small plants:

* Succulents: Many succulents are small, like aloes, agaves, and sedums.

* Shrubs: Some desert shrubs are small, like creosote bush and brittlebush.

* Grasses: Desert grasses are often short and sparse, like grama grass and galleta grass.

* Annuals: Many desert plants are annuals, meaning they only live for one season. They tend to be small and grow quickly when there is rain.

So, the answer is both! While deserts are known for their arid conditions and limited vegetation, there are both large and small plants adapted to survive in this harsh environment.