Polygonum sachalinensis (F. Schmidt ex maxim) Ronse Decr.

Oregon: Clatsop County: Hammond; shore of the Columbia river in the boat basin.
46.20615° N, 123.95159° W
Datum: WGS 84. Coordinate Source: GPS.
Sandy shore of the river. Associated taxa: Alnus, Elymus, Rubus, Cytisus, Ammophila. Flowers white; plants forming large colonies, to 2.45 meters tall.

R. Halse s.n., 9/11/2006
UAAH, Accession: 497