Representative species from the three nuclear clades of Solanum section Petota. Left: Solanum verrucosum Clade 4. Top right: S. hypacrarthrum Clade 3. Middle right: S. violaceimarmoratum Clade 4. Bottom right: S. bulbocastanum Clade 1+2. See Spooner, pp. 191–203 in this issue. Art plate was designed by Alice Tangerini.