pinnately compound, which means one leaf has many (7 - 19) leaflets on one main stem. Leaflets are always paired, except for the one on the end of the leaf. Leaf color is bluish-green on top, and pale underneath. The entire leaf is 6 to 12 inches long. Leaflets are oval-shaped and less than 2 inches long with no teeth and a bristle tip. At night leaflets fold up and droop.