Key to Varieties of Rosenbergiodendron formosum
1. Leaves adaxially matte, abaxially with midrib and secondary veins more or less plane; fruits subglobose to ellipsoid; Panama, Colombia, Ecuador, northwestern Venezuela, and Tobago...... var. formosum
1'. Leaves adaxially shiny, abaxially with midrib and secondary veins impressed; fruits ellipsoid; Orinoco basin in eastern Venezuela..... var. nitidum