Davis' Knotweed

Aconogonon davisiae

Poke Knotweed

Aconogonon phytolaccifolium

Western Bistort

Bistorta bistortoides

Swamp Knotweed

Persicaria amphibia

Water Smartweed

Persicaria punctata

Bidwell's Knotweed

Polygonum bidwelliae

Bolander's Knotweed

Polygonum bolanderi

California Knotweed

Polygonum californicum

Douglas' Knotweed

Polygonum douglasii

Broadleaf Knotweed

Polygonum minimum

Parry's

Polygonum parryi

Milkwort Knotweed

Polygonum polygaloides

Fruitleaf Knotweed

Polygonum polygaloides ssp. confertiflorum

Kellogg's Knotweed

Polygonum polygaloides ssp. kelloggii

Polygonum sawatchense

Polygonum sawatchense ssp. oblivium

Polygonum sawatchense ssp. sawatchense

Shasta Knotweed

Polygonum shastense

Spurry Knotweed

Polygonum spergulariiforme