[The Buckwheat Family West of the Cascade Mountains]
Knotweeds West of the Cascade Mountains of Oregon and Washington

The Genus Polygonum

 

 

Bohemian Knotweed, Hybrid Japanese Knotweed: Fallopia Xbohemica (Synonyms: Polygonum Xbohemicum, Reynoutria Xbohemica) -

Climbing Knotweed, Ivy Bindweed: Fallopia convolvulus (Synonyms: Polygonum convolvulus, Polygonum convolvulus var. convolvulus) -

Japanese Knotweed: Fallopia japonica (Synonyms: Polygonum cuspidatum, Reynoutria japonica) -

Giant Knotweed: Fallopia sachalinense (Synonyms: Polygonum sachalinense, Reynoutria sachalinense) -

Alaska Wild Rhubarb: Polygonum alpinum -

Common Knotweed, Oval-leaf Knotweed, Prostrate Knotweed, Yard Knotweed: Polygonum aviculare ssp. depressum (Synonym: Polygonum arenastrum) -

Common Knotweed, Narrow-leaf Knotweed, Prostrate Knotweed, Yard Knotweed: Polygonum aviculare ssp. neglectum (Synonym: Polygonum aviculare var. angustissimum) -

California Knotweed: Polygonum californicum -

Cascade Knotweed: Polygonum cascadense -

Douglas' Knotweed, Austin's Knotweed: Polygonum douglasii (Synonyms: Polygonum douglasii ssp. douglasii, Polygonum douglasii var. douglasii, Polygonum douglasii var. latifolium, Polygonum montanum) -

Fowler's Knotweed: Polygonum fowleri ssp. fowleri -

Palouse Knotweed, Wiry Knotweed: Polygonum majus (Synonyms: Polygonum coarctatum, Polygonum douglasii ssp. majus) -

Broadleaf Knotweed, Broad-leaved Knotweed, Zigzag Knotweed, Leafy Dwarf Knotweed: Polygonum minimum (Synonym: Polygonum torreyi) -

Nuttall's Knotweed: Polygonum nuttallii (Synonym: Polygonum douglasii ssp. nuttallii) -

Black Knotweed, Beach Knotweed, Nailwort Knotweed: Polygonum paronychia -

Parry's Knotweed: Polygonum parryi -

Closeflowered Knotweed, Close-flowered Knotweed: Polygonum polygaloides ssp. confertiflorum (Synonyms: Polygonum confertiflorum, Polygonum imbricatum, Polygonum kelloggii var. confertiflorum, Polygonum watsonii) -

Kellogg's Knotweed: Polygonum polygaloides ssp. kelloggii (Synonyms: Polygonum kelloggii, Polygonum minutissimum, Polygonum unifolium) -

Sawatch Knotweed: Polygonum sawatchense (Synonyms: Polygonum douglasii ssp. johnstonii, Polygonum douglasii var. johnstonii, Polygonum sawatchense ssp. oblivium) -

Fall Knotweed, Spury Knotweed: Polygonum spergulariaeforme (Synonyms: Polygonum douglasii ssp. spergulariiforme, Polygonum emaciatum, Polygonum spergulariaeforme) -

Paul Slichter E-mail