|Rio Grande is a medium, deciduous tree, reaching 30 feet in spread at maturity. It's form is a pyramidal shape when young, spreading and more open when mature. It bears succulent, pinnate, dark green leaves turning golden-yellow in the fall. Leaves are larger than Modesto, with up to 3 to 7 lance-shaped, tapered, leaflets. Female and male flowers on separate trees are insignificant, produces no fruit. The foliage is resistant to wind burn and withstands hot dry conditions and cold down to -10 degrees F. Will tolerate alkaline soils.