Littleleaf Leadtree (Leucaena retusa) - ON YOUR LEFT - All along the meager shelter of this shallow arroyo grows the littleleaf leadtree. While most leadtree species are found in tropical regions, the littleleaf leadtree likes the dry, rocky canyons of the northern Chihuahuan Desert. Its long pods remain on the tree throughout the winter, simplifying identification when the fern-like leaves have fallen. After a good rain, this tree will produce distinctive yellow flower balls. This tree makes a desirable native ornamental in desert landscaping.