This is a native of western China's arid interior basins. Talk about a desert, plus highs are well over 100F much of the summer, and their winters are as cold as portions of the Great Basin. It is at least as hardy as arid and semiarid USDA z 5-8. Cool, blue stems.
And back home to the Chihuahuan Desert of New Mexico.
Canutillo or Desert Joint Fir / Ephedra trifurca: