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Home  >  Departments  >  Public Works  >  PW Divisions  >  Road Maintenance  >  Noxious Weeds  >  Class A Weed List

Noxious Weeds in Snohomish County 2011: Classes and Status

Weed List: Class A

 

Class A noxious weeds are those noxious weeds not native to the state that are of limited distribution or are unrecorded in the state and that pose a serious threat to the state. These weeds are a threat to all counties of the state and eradication is required.

Common Name
 
bean-caper, Syrian
blueweed, Texas
broom, Spanish
buffalobur
clary, meadow
cordgrass, smooth
cordgrass, common
cordgrass, salt meadow
cordgrass, denseflower
crupina, common
European hawkweed
false brome
flax, spurge
floating primrose-willow
flowering rush
four o' clock, wild
hawkweed, yellow devil
hogweed, giant
hydrilla
johnsongrass
knapweed, bighead
knapweed, Vochin
kudzu
mustard, garlic
nightshade, silverleaf
reed sweatgrass
ricefield bulrush
sage, clary
sage, Mediterranean
shiny geranium
spurge, eggleaf
starthistle, purple
thistle, Italian
thistle, milk
thistle, slenderflower
velvetleaf
variable-leaf milfoil
woad, dyers

Scientific Name
 
Zygophyllum fabago
Helianthus ciliaris
Spartium junceum
Solanum rostratum
Salvia pratensis
Spartina alterniflora
Spartina anglica
Spartina patens
Spartina densiflora
Crupina vulgaris
Hieracium sabaudum
Brachypodium sylvaticum
Thymelaea passerina
Ludwigia peploides
Butomus unbellatus
Mirabilis nyctaginea
Hieracium floribundum
Heracleum mantegazzianum
Hydrilla verticillata
Sorghum halepense
Centaurea macrocephala
Centaurea nigrescens
Pueraria montana var. lobata
Alliaria petiolata
Solanum elaeagnifolium
Gyceria maxima
Schoenoplectus mucronatus
Salvia sclarea
Salvia aethiopis
Geranium lucidum
Euphorbia oblongata
Centaurea calcitrapa
Carduus pycnocephalus
Silybum marianum
Carduus tenuiflorus
Abutilon theophrasti
Myriophyllum heterophyllum
Isatis tinctoria

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