Originally reported as Japanese Knotweed (Fallopia japonica)
Submitter has sample
EDRR Status: Local expert notified
About 100 plants growing out of an old burn pile.
Thank you again for this report of knotweed. As mentioned in my previous response Japanese knotweed is a significant problem invader in riparian communities within Clackamas County.
Please feel free to contact me if you have any additional questions. You may also check these online resources for more information on knotweed.
http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/21809/em9031.pdf
http://your.kingcounty.gov/dnrp/library/water-and-land/weeds/BMPs/Knotweed-Control.pdf
http://www.imapinvasives.org/GIST/ESA/esapages/documnts/polycus.pdf
Again thank you for reporting this invader. All the best,
Sam
______________________________________
Samuel Leininger
WeedWise Program Manager
Clackamas Soil & Water Conservation District
221 Molalla Ave. Suite 102
Oregon City, OR 97045
503-210-6006
weeds@conservationdistrict.org
www.conservationdistrict.org
______________________________________
Samuel Leininger
June 5, 2013, 3:42 a.m.