ZZ plants have striking dark-green, leaves. Individual leaves originate directly from the ground and sport bulbous, fleshy bases. Round or oval leaflets emerge in pairs from each leaf’s main stem. Leaflets are smooth, gleaming and reach lengths of 6 inches. This tropical plant grows to a mature height of 2 to 3 feet and adds lushness to its surroundings with its arching leaf stems. Adult ZZ plants produce a whitish-yellow, spike flower that protrudes out of the center of the plant. The flower spike sits in front of a calla-lily-shaped fleshy structure.