Western Bistort

Bistorta bistortoides

Swamp Knotweed

Persicaria amphibia

Water Pepper

Persicaria hydropiperoides

Water Smartweed

Persicaria punctata

Bolander's Knotweed

Polygonum bolanderi

California Knotweed

Polygonum californicum

Douglas' Knotweed

Polygonum douglasii

Scotts Valley Polygonum

Polygonum hickmanii

Marin Knotweed

Polygonum marinense

Broadleaf Knotweed

Polygonum minimum

Beach Knotweed

Polygonum paronychia

Parry's

Polygonum parryi

Milkwort Knotweed

Polygonum polygaloides

Kellogg's Knotweed

Polygonum polygaloides ssp. kelloggii

Bushy Knotweed

Polygonum ramosissimum

Bushy Knotweed

Polygonum ramosissimum ssp. ramosissimum

Polygonum sawatchense

Polygonum sawatchense ssp. sawatchense