On Tuesday, August 12, and Saturday, August 16, the Polly Hill Arboretum will offer two tours highlighting native trees and plants. On August 12 from 10 to 11 a.m. join Karin Stanley, arboretum staff member and amateur historian, for a tour of native trees and shrubs on the grounds. Knowing the cultural history of these plants gives them an identity that distinguishes them from “just part of the woods.” Learn the wide range of uses these plants have had over the years and how this reflects the history of the human societies that have used them. The cost is $5, or free to members.

On August 16 from 10 a.m. to noon, join arboretum staff for their annual visit to Chappaquiddick to explore the wealth of native plants along the trails near the Chappy Community Center. From bog and wetland plants near Brine’s Pond to species common to the fields and woodlands, this annual walk always find interesting plants to identify and enjoy. Learn the natural and cultural history of some of these plants and how their presence may indicate past uses of the land. Meet at the community center. Cost is $24 or $20 for members. For details, call 508-693-9426.