Links are to the Washington State Noxious Weed Control Board website Class A weed pages or to the Franklin County Noxious Weed Control Board's printable information packet for that weed.


Class A noxious Weeds

Common Name
Scientific Name
common crupina
Cuprina vulgaris
cordgrass, common
Spartina anglica
cordgrass, dense-flowered
Spartina densiflora
cordgrass, salt meadow
Spartina patens
cordgrass, smooth
Spartina alterniflora
dyer's woad
Isatis tinctoria
eggleaf spurge
Euphorbia oblongata
false-brome
Brachypodium sylvaticum
floating primrose-willow
Ludwigia peploides
flowering rush

Butomus umbellatus

French broom
Genista monspessulan
garlic mustard
Alliaria petiolata
giant hogweed
Heracleum mantegazzianum
goatsrue
Galega officinalis
hydrilla
Hydrilla verticillata
Johnsongrass
Sorghum halepense
knapweed, bighead
Centaurea macrocephala
knapweed, Vochin
Centaurea nigrescens
kudzu
Pueraria montana var. lobata
meadow clary
Salvia pratensis
oriental clematis
Clematis orientalis
purple starthistle
Centaurea calcitrapa
reed sweetgrass
Glyceria maxima
ricefield bulrush
Schoenoplectus mucronatus
sage, clary
Salvia sclarea
sage, Mediterranean
Salvia aethiopis
silverleaf nightshade
Solanum elaeagnifolium
Spanish broom
Spartium junceum
spurge flax
Thymelaea passerina
Syrian bean-caper
Zygophyllum fabago
Texas blueweed
Helianthus ciliaris
thistle, Italian
Carduus pycnocephalus
thistle, milk
Silybum marianum
thistle, slenderflower
Carduus tenuiflorus
variable-leaf milfoil
Myriophyllum heterophyllum
wild four-o'clock
Mirabilis nyctaginea


Class A weeds are non-native species with a limited distribution.  Preventing new infestations and eradicating existing infestations is the highest priority.  Eradication is required by law.



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White Bryony

Bold indicates "present in Franklin County".

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