Historical collections of the four selected expeditions of Theobroma and Herrania, carried out by José Cuatrecasas, Richard E. Schultes, Boris A. Krukoff and the Anglo-Colombian Cacao Collecting Expedition, led by Richard E.D. Baker, Francis William Cope, Paul C. Holliday, Basil G.D. Bartley and D.J. Taylor, from the Imperial College of Tropical Agriculture, Trinidad.