Browse Plants by Genus: Polygonum
Polygonum bistortoides
western bistort
Polygonum lapathifolium
willow smartweed
Polygonum persicaria
lady's-thumb knotweed
Polygonum phytolaccifolium
alpine knotweed
Polygonum aviculare
common knotweed
Polygonum douglasii
Douglas's knotweed
Polygonum paronychia
beach knotweed
Polygonum amphibium
water smartweed
Polygonum cuspidatum
Japanese knotweed
Polygonum minimum
broadleaf knotweed
Polygonum polygaloides
white-margined knotweed
Polygonum davisiae
Davis' knotweed
Polygonum shastense
Shasta knotweed