Carol Govan talks about the connections among related plants and how they express their genetic heritage in response to their environments in this Friday, October 21 lecture and greenhouse walk at the Wellesley College Botanic Gardens, beginning at 10 am. Succulents have adapted to habitats that experience temporary drought. Observe the amazing forms, thick, fleshy leaves, stems and branches that help several plant families survive in this unforgiving environment. See Wellesley’s succulent collection, especially those from the cactus family, the most well known succulent. Friends of Wellesley College Botanic Gardens free, nonmembers $10. Register by calling 781-283-3094.