This image was created by Rick Thompson and is available for purchase in a variety of sizes through IStock. A black-and-white silhouette of a cannabis garden, with leaves prominent against a light background. Dark ad copy can appear on top, and light copy below. A horizontal image that prominently shows the iconic marijuana leaf shape. Click on the image to view it in greater detail, or to make a purchase. http://www.istockphoto.com/photo/cananbis-garden-silhouette-gm483779754-70837987