Spiny Arizona plants (5)

I believe the answer is:

cacti

(Other definitions for cacti that I've seen before include "Spiny succulents" , "flowers" , "Desert features" , "Prickly types" , "Plants native to arid regions" .)

I've seen this clue in the Newsday.com and the Newsday.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.