Sheffield's Seed Company Desert smoke tree (Psorothamnus spinosus) is an unusual, spinescent tree which often defies what we consider as a tree, though it often has a trunk and a canopy. This almost leafless, spiny How to Plant and Grow Smoke Tree or Smokebush Smoke tree seed pods found in garden area Cotinus: American Smoke Tree Portland Nursery Smoke Tree, Dalea spinosa DesertUSA