GROTON --The Nashua River Watershed Association invites you to a free "Aquatic Plant Identification Workshop" on Tuesday, Sept. 25, at 6 p.m., at the NRWA River Resource Center, 592 Main St. (Route 119). Led by Tom Flannery, Aquatic Ecologist with the Massachusetts Department of Conservation and Recreation's Lakes and Ponds Program, this 90-minute workshop begins with an introduction to the invasive non-native species issue, how exotic species are introduced into our waterways, methods of dispersal, basic terminology, and guidance on performing bi-weekly monitoring and completing plant surveys. The remaining 3/4 of the class will engage participants in hands-on identification. Non-native and native plant species are provided, and people are encouraged to bring in their own samples of aquatic plants (no terrestrials please).

This workshop is free and made possible by a grant from the Greater Lowell Community Foundation. The workshop is limited to 30 people; pre-registration is required. To register, please contact Kate McNierney at 978-448-0299, or email