Peter Del Tredici spent more than thirty years at the Arboretum, researching the interaction between woody plants and their environment. One particular area of interest was the genus Tsuga, or the hemlocks. Join Del Tredici for a talk on his original hemlock research and learn about the ecology of Tsuga canadensis, the history of Sargent’s weeping hemlock, the impact of hemlock woolly adelgid, and the discovery of a new hemlock species in Korea.