I was in New Mexico recently and found some lovely iris plants (native I
guess) near Las Vegas. The area is quite a desert, but on the road out of
town (Hwy 104, to the east of town) I found a lot of irises growing. They
were really pretty, pale-blue to white-blue.

They grew in clumps and when I dug down I could see they were bulb-type
irises. They grew alongside the road where water would collect from rains
and snow melt. I didn't see them anywhere else in New Mexico.