Some of the plantlife:

UL Fourwing saltbush. Atriplex canescens is a species of evergreen shrub in the family Amaranthaceae native to the western and midwestern US.
UR Gutierrezia sarothrae is a species of flowering plant in the family Asteraceae known by the common names broom snakeweed, broomweed, snakeweed, and matchweed.

Middle Chain Cholla
LL Saguaro
LR Arizona Grapevine