Land Plants - invasive

Knotweed (unknown species) (Fallopia sp.) on Apr 24, 2011

Originally reported as Giant Knotweed (Fallopia sachalinense)

Submitter does not have a specimen
EDRR Status: Local expert notified

Description of specimen

Tall patches of Giant Knotweed. Estimated at about 12 feet tall, at least. The plant was flowering last seen in September of 2010.

Commentary

None

Remedy

Knotweed Shrub Complex: Identification, Biology, and Management, Oregon Extension Service

Location

On south side of Walnut St's culvert/bridge overpass. The culvert/bridge area is across the street from an apartment complex which also has some smaller patches of knotweed adjacent to the apt complex's fence. The large knotweed patch is growing in the sewage drainage area under the culvert/bridge overpass.

Expert Reviewer

Mr. Vern Holm
Director, Oregon Vegetation Management Association

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