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 (Crantz) Bess.
Field bindweed Convolvulus arvensis L.
Hedge bindweed Calystegia Spp.
Camelthorn Alhagi maurorum
Canada thistle Cirsium arvense (L.) Scop.
Dodder Cuscuta spp.
Hairy whitetop Lepidium appelianum
Hoary cress Lepidium draba (L.) Desv.
Jointed goatgrass Aegilops cylindrica
Leafy spurge Euphorbia esula L.
Perennial pepperweed Lepidium latifolium L.
Perennial sowthistle Sonchus arvensis L.
Quackgrass Elymus repens
Knapweed complex
Bighead Centaurea macrocephala
Vochin Centaurea nigrescens
Black Centaurea nigra
Brown Centaurea jacea
Diffuse Centaurea diffusa
Meadow Centaurea jacea x nigra
Russian Rhaponticum repens
Spotted Centaurea stoebe
Purple starthistle Centaurea calcitrapa
Yellow starthistle Centaurea solstitialis L.
Serrated tussock Nassella trichotoma
Silverleaf nightshade Solanum elaeagnifolium Cav.
Sorghum perennial such as, but not limited to, johnsongrass, sorghum almum, and perennial sweet sudangrass Sorghum spp.
Tansy ragwort Jacobaea vulgaris
Yellow-flowering skeleton weed

Chondrilla juncea L
White cockle Silene latifolia (only in timothy)
Bladder campion Silene vulgaris (only in timothy)
Lepyrodiclis Lepyrodicilis holsteoides
Velvetleaf Abutilon theophrasti




[Statutory Authority: Chapter 15.49 RCW. 09-16-006, § 16-302-100, filed 7/22/09, effective 8/22/09. Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3) and chapter 17.24 RCW. 00-24-077, § 16-302-100, filed 12/4/00, effective 1/4/01.]