WAC 16-302-100. Seed certification — Prohibited noxious weed seed

The following are considered prohibited noxious weeds for the purpose of seed certification. english or common name botanical or scientific name Austrian fieldcress Rorippa austriaca Field bindweed Convolvulus arvensis Hedge bindweed Calystegia spp. Camelthorn Alhagi maurorum Canada thistle Cirsium arvense Dodder Cuscuta spp. Hairy whitetop Lepidium appelianum Hoary cress Lepidium draba Jointed goatgrass and jointed goatgrass hybrids Aegilops cylindrica Leafy spurge Euphorbia esula Palmer amaranth Amaranthus palmeri Perennial pepperweed Lepidium latifolium Perennial sowthistle Sonchus arvensis Quackgrass Elymus repens Knapweed complex: Bighead Centaurea macrocephala Vochin Centaurea nigrescens Black Centaurea nigra Brown Centaurea jacea Diffuse Centaurea diffusa Meadow Centaurea x moncktonii Russian Rhaponticum repens Spotted Centaurea stoebe subsp. australis Purple starthistle Centaurea calcitrapa Yellow starthistle Centaurea solstitialis Serrated tussock Nassella trichotoma Silverleaf nightshade Solanum elaeagnifolium Cav. Sorghum perennial such as, but not limited to, johnsongrass, columbus grass, and perennial sweet sudangrass Sorghum spp. Sorghum halepense Sorghum almum Sorghum bicolor (L.) Moench ssp. drummondii Tansy ragwort Jacobaea vulgaris Yellow-flowering skeleton weed Chondrilla juncea White cockle Silene latifolia (only in timothy) Bladder campion Silene vulgaris (only in timothy) Lepyrodiclis Lepyrodicilis holosteoides Velvetleaf, Butterprint Abutilon theophrasti english or common name botanical or scientific name Austrian fieldcress Rorippa austriaca Field bindweed Convolvulus arvensis Hedge bindweed Calystegia spp. Camelthorn Alhagi maurorum Canada thistle Cirsium arvense Dodder Cuscuta spp. Hairy whitetop Lepidium appelianum Hoary cress Lepidium draba Jointed goatgrass and jointed goatgrass hybrids Aegilops cylindrica Leafy spurge Euphorbia esula Palmer amaranth Amaranthus palmeri Perennial pepperweed Lepidium latifolium Perennial sowthistle Sonchus arvensis Quackgrass Elymus repens Knapweed complex: Bighead Centaurea macrocephala Vochin Centaurea nigrescens Black Centaurea nigra Brown Centaurea jacea Diffuse Centaurea diffusa Meadow Centaurea x moncktonii Russian Rhaponticum repens Spotted Centaurea stoebe subsp. australis Purple starthistle Centaurea calcitrapa Yellow starthistle Centaurea solstitialis Serrated tussock Nassella trichotoma Silverleaf nightshade Solanum elaeagnifolium Cav. Sorghum perennial such as, but not limited to, johnsongrass, columbus grass, and perennial sweet sudangrass Sorghum spp. Sorghum halepense Sorghum almum Sorghum bicolor (L.) Moench ssp. drummondii Tansy ragwort Jacobaea vulgaris Yellow-flowering skeleton weed Chondrilla juncea White cockle Silene latifolia (only in timothy) Bladder campion Silene vulgaris (only in timothy) Lepyrodiclis Lepyrodicilis holosteoides Velvetleaf, Butterprint Abutilon theophrasti