Massive deforestation of the matorral and clearcutting forests particularly in the 1970s has created new deserts and flash flooding, influenced by short distances from the mountains to the sea. Of course, the major natural selection is for heat resistance (Cushman & Borland, 2000), and all changed environments are thereby new ones. Guaymas is a brilliant exposition of how the changing niche can modify its floral contents. It is a secondary center of origin with tiny leaves readily mapable phenotypically.