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Noxious Weed Pictorial Index – 2017

Program Contact: Timothy Lawrence
(360) 639-6061 • timothy.lawrence@wsu.edu
Island County property owners are

required to eradicate  the Regulated Class A Noxious Weeds listed below

required to control  the Regulated Class B or C Noxious Weeds listed below

asked to control  the Non-Regulated Class B or C Noxious Weeds listed below

Click on any picture below for more information.

cordgrass, common
Spartina anglica
Class A Noxious Weed

cordgrass, denseflowered
Spartina densiflora
Class A Noxious Weed

garlic mustard
Alliaria petiolata
Class A Noxious Weed

giant hogweed
Heracleum mantegazzianum
Class A Noxious Weed

knapweed, bighead
Centaurea macrocephala
Class A Noxious Weed

meadow clary
Salvia pratensis
Class A Noxious Weed

purple starthistle
Centaurea calcitrapa
Class A Noxious Weed

sage, clary
Salvia sclarea
Class A Noxious Weed

Spanish broom
Spartium junceum
Class A Noxious Weed

thistle, milk
Silybum marianum
Class A Noxious Weed

Brazilian elodea
Egeria densa
Class B Noxious Weed

common fennel
Foeniculum vulgare
Class B Noxious Weed

common reed (non-native genotypes)
Phragmites australis
Class B Noxious Weed

Dalmatian toadflax
Linaria dalmatica ssp. dalmatica
Class B Noxious Weed

Eurasian watermilfoil
Myriophyllum spicatum
Class B Noxious Weed

gorse
Ulex europaeus
Class B Noxious Weed

hairy willowherb
Epilobium hirsutum
Class B Noxious Weed

hawkweed, orange
Hieracium aurantiacum
Class B Noxious Weed

hawkweed, yellow
Hieracium caespitosum
Class B Noxious Weed

knapweed, brown
Centaurea jacea
Class B Noxious Weed

knapweed, diffuse
Centaurea diffusa
Class B Noxious Weed

knapweed, meadow
Centaurea jacea x nigra
Class B Noxious Weed

knapweed, spotted
Centaurea stoebe
Class B Noxious Weed

knotweed, Bohemian
Polygonum x bohemicum
Class B Noxious Weed

knotweed, giant
Polygonum sachalinense
Class B Noxious Weed

knotweed, Himalayan
Polygonum polystachyum
Class B Noxious Weed

knotweed, Japanese
Polygonum cuspidatum
Class B Noxious Weed

loosestrife, purple
Lythrum salicaria
Class B Noxious Weed

parrotfeather

Myriophyllum aquaticum
Class B Noxious Weed

poison hemlock
Conium maculatum
Class B Noxious Weed

spurge laurel
Daphne laureola
Class B Noxious Weed

sulfur cinquefoil
Potentilla recta
Class B Noxious Weed

tansy ragwort
Senecio jacobaea
Class B Noxious Weed

thistle, musk
Carduus nutans
Class B Noxious Weed

velvetleaf
Abutilon theophrasti
Class B Noxious Weed

wild chervil
Anthriscus sylvestris
Class B Noxious Weed

yellow archangel
Lamiastrum galeobdolon
Class B Noxious Weed

bull thistle
Cirsium vulgare
Class C Noxious Weed

Canada thistle
Cirsium arvense
Class C Noxious Weed

absinth wormwood
Artemisia absinthium
Class C Noxious Weed

babysbreath
Gypsophila paniculata
Class C Noxious Weed

buffalobur
Solanum rostratum
Class C Noxious Weed

butterflybush
Buddleja davidii
Class B Noxious Weed

common catsear
Hypochaeris radicata
Class C Noxious Weed

common groundsel
Senecio vulgaris
Class C Noxious Weed

common St. Johnswort
Hypericum perforatum
Class C Noxious Weed

common tansy
Tanacetum vulgare
Class C Noxious Weed

common teasel
Dipsacus fullonum
Class C Noxious Weed

curlyleaf pondweed
Potamogeton crispus
Class C Noxious Weed

English ivy – four cultivars only
Hedera helix ‘Baltica’, ‘Pittsburgh’, and ‘Star’
H. hibernica ‘Hibernica’

Class C Noxious Weed

evergreen blackberry
Rubus laciniatus
Class C Noxious Weed

field bindweed
Convolvulus arvensis
Class C Noxious Weed

herb-Robert
Geranium robertianum
Class B Noxious Weed

Himalayan blackberry
Rubus armeniacus
Class C Noxious Weed

Italian arum
Arum italicum
Class C Noxious Weed

Japanese eelgrass
Zostera japonica
Class C Noxious Weed

jubata grass
Cortaderia jubata
Class C Noxious Weed

old-man’s-beard
Clematis vitalba
Class C Noxious Weed

oxeye daisy
Leucanthemum vulgare
Class C Noxious Weed

pampas grass
Cortaderia selloana
Class C Noxious Weed

reed canarygrass
Phalaris arundinacea
Class C Noxious Weed

scentless mayweed
Matricaria perforata
Class C Noxious Weed

Scotch broom
Cytisus scoparius
Class B Noxious Weed

smoothseed alfalfa dodder
Cuscuta approximata
Class C Noxious Weed

wild carrot
Daucus carota
Class C Noxious Weed

yellowflag iris
Iris pseudacorus
Class C Noxious Weed

yellow toadflax
Linaria vulgaris
Class C Noxious Weed