Gail Kahn, Assistant Director of the Wellesley College Botanic Gardens, will lead a tour through their 16 interconnected greenhouses, which house the most diverse collection of plants under glass in the greater Boston area. Highlights of the season may include birds of paradise, orchids, and a blooming Durant camellia, a 130 year old specimen which came from the founder of the college. The tour is sponsored by the Massachusetts Horticultural Society, and you may sign up ($12 for Mass Hort members, $20 for nonmembers) at www.masshort.org.