The New England Botanical Club offers meetings with lectures as well as field trips. Meetings are held in Haller Lecture Hall (Room 102), inside the door to the right of the Harvard Museum of Natural History entrance at 24 Oxford Street.
Harvard University, Campus Map.
Here are upcoming field trips and meetings:
March 2, 2018- Evolution of Conifer Cones
April 6, 2018- New England Lichens