Submitter does not have a specimen
to my untrained eye the plants appear to be Eurasin Watermilfoil, long strings of material with green spikes that form dense mats, the stuff has grown remarkably fast this past summer
http://www.dfw.state.or.us/agency/commission/minutes/07/jan/L_Fern%20Ridge%20Wildlife%20Area%20Plan-%20Draft.pdf
We appreciate your report on watermilfoil.
Lisa DeBruyckere
Nov. 5, 2011, 3:52 p.m.