Dunwoody Nature Center, 5343 Roberts Drive, Dunwoody, 30338. Georgia Perennial Plant Association presents speaker, Mark Weathington, Director of the JC Raulston Arboretum in Raleigh, NC. Admission is free for members, $10 for non-members. Social time begins at 6:30 pm, speaker begins at 7:30. More information available at Georgiaperennial.org