The UW-Green Bay Retiree Association is sponsoring the ninth annual arboretum walk on Tuesday, May 21, at 10:30 a.m. Bobbie Webster, natural areas ecologist for the Cofrin Center for Biodiversity, will lead the walk. Interested participants should meet at the Lambeau Cottage parking lot at 10:30 a.m. The walk will be slow and easy as the group looks to identify spring plants, plant communities, invasive plants, and how our Arboretum is managed. Bring your binoculars and plant book. Bring your camera to take pictures along the walk and send them to incorporate into the Retiree Association website. See the 2018 walk at www.uwgb.edu/retiree/showcase. An informal gathering for lunch will follow at Shorewood Club.