Now, how do you tell the first two ardisia apart? Blossoms and leaves. The blossoms on the Marlberry (A. escallonioides) tend to be in non-drooping white clusters (or pink) with purple lines and spots. The flowers of the Shoebutton (A. elliptica) are purple to violet or pink white and are found in small, hanging clusters. The Shoebutton also tends to have narrow long leaves and the Marlberry wide long leaves, up to two inches wide.