Invasive Plant Workshop The Corps of Engineers and Polk County Conservation Board will be hosting a seminar on invasive plants August 2 from 1-5 pm in the Oak Woods Learning Center. A speaker from Iowa State University will be showing participants how to identify invasive plants, GPS their location, and make the data available for use by ISU. The seminar is open and free to the public. If you need directions, contact me at [log in to unmask] Jane Clark - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To get off the IOWA-TOPICS list, send any message to: [log in to unmask]