>Beyond that book does anyone have any other books, articles, ideas, >theories, etc? That might be useful in introducing evolution of geophytes >as a curriculum? I find the evolution of geophytes fascinating because it is evident that the growth form has evolved independently in so many distantly related groups of plants. There is an interesting paper by Proches et al (2006) examining this issue for Cape geophytes: https://academic.oup.com/biolinnean/article/…. Because the geophyte habit has originate so many times it is an excellent example of convergent evolution. Not only has the geophyte habit arisen multple times, but also each the specific kinds of structures (bulbs, corms, tubers) have arisen many times. When similar structures evolve independently in multiple groups of plants in response to similar environmental conditions, it provides quite strong evidence of the role of natural selection. Best of luck! Bill _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…