Carol Govan has been a popular speaker with The Garden Club of the Back Bay.  Join her on Saturday, January 30 at the Wellesley College Botanic Garden for this one session class beginning at 10 am.  Winter is a great time to identify trees based on their overall structure and twig and bud characteristics. Close observation can also reveal clues to the adaptive strategies of various tree species. You will begin indoors at the Wellesley College Greenhouse Visitor Center, carefully looking at twigs and other tree parts, discovering family and genus similarities, and examining indicators of the growth cycles of evergreens. After lunch Carol will lead you through the Wellesley College Botanic Gardens to identify trees, observing both large- and small-scale details. Bring a lunch and hand lens and dress for cold weather. (Snow date: February 13) Fee $50 Arnold Arboretum or Wellesley College Friends of Horticulture member, $65 nonmember.  To register, or for more information, log on to www.arboretum.harvard.edu.