Palmer Amaranth
A new noxious weed has been added to the Class A list as of 2024. Palmer amaranth, Amaranthus palmeri was found in the state recently and so I am adding it here too.
https://www.nwcb.wa.gov/weeds/palmer-amaranth
Also added hybrid variable-leaf milfoils https://www.nwcb.wa.gov/weeds/variable-leaf-milfoil
Actually I did not add this. I flagged the genus for curation. For now there is no Myriophyllum heterophyllum x Myriophyllum hippuroides taxon available on iNaturalist.