Douglas' Knotweed, Austin's Knotweed
Polygonum douglasii
Synonyms: Polygonum douglasii ssp. douglasii, Polygonum douglasii var. douglasii, Polygonum douglasii var. latifolium, Polygonum montanum
![Douglas' Knotweed: Polygonum douglasii (Synonyms: Polygonum douglasii ssp. douglasii, Polygonum douglasii var. douglasii, Polygonum douglasii var. latifolium, Polygonum montanum)](../../../../cascade/mtadams/3/buck/polygonum/douglasii/douglasii3a.jpg)
Douglas' knotweed is generally a slender, erect species with several narrowly oblanceolate stem leaves. The flowers are axillary.
Paul Slichter