Thanks for reporting this yellow flag iris to the website hotline, Bruce. Yellow flag iris is a tenacious invasive and your report will be useful to flesh out the distribution of this species. Since yellow flag iris is already abundant in many areas of valley, these particular plants may not be controlled immediately, but I will forward your report to the Upper Willamette Cooperative Weed Management Area coordinator to make sure they're aware of it. I will let you know what I hear back.

Thanks again for the report.

Vanessa
Vanessa Howard
Portland State University - Center for Lakes & Reservoirs

Vanessa Howard Morgan
May 26, 2010, 4:05 a.m.