Recognize Bing cherry leaves by their 3- to 6-inch center-line length and small, blunt teeth that encircle the leaf margin.
Inspect leaves that you suspect of being the Black Tartarian variety for their telltale 5.5-inch center-line length, sharp pointed terminal leaf tip and sharp teeth all along the leaf margin.
Distinguish Bing and Black Tartarian leaves by evaluating their textural characteristics. Black Tartarian leaves are thin and sport a dark green color and waxy finish on the top-side of the leaves. Bing leaves are also dark green but have a smooth topside and a lighter-hued green underside, with a sparse velvety fuzz coating.