Early detection of invasive plants with an aggressive control/eradication program will help manage noxious invaders before they can cause harm.  Identification and education are key factors in a successful weed management program. The following are invasive species that are threatening our native, natural and agricultural lands in Franklin County.  In some instances these invaders are sneaking into isolated areas, making it hard for weed inspectors to find.  If you need help with plant identification or control, contact the FCNWCB. We are here to help. The following are noxious weeds we are working on, or monitoring to prevent further spread.


Common Name
Scientific Name
Weeds of Concern
babysbreath 
Gypsophila paniculata 
camelthorn
Alhagi maurorum
Canada thistle
Cirsium arvense
cereal rye
Secale cereal
common reed (non-native genotypes) 
Phragmites australis
Dalmation toadflax
Linaria dalmatica ssp. dalmatica
diffuse knapweed
Centaurea diffusa
hoary cress
Cardaria draba
houndstongue
Cynoglossum officinale
Japanese knotweed
Polygonum cuspidatum
jointed goatgrass
Aegilops cylindrica
kochia
Kochia scoparia
longspine sandbur
Cenchrus longispinus
musk thistle
Carduus nutans
myrtle spurge
Euphorbia myrsinites
poison hemlock
Conium maculatum
puncturevine
Tribulus terrestris
purple loosestrife
Lythrum salicaria
Ravenna grass
Saccharum ravennae
rush skeletonweed
Chondrilla juncea
saltcedar
Tamarix ramosissima
Scotch thistle
Onopordum acanthium
spotted knapweed
Centaurea stoebe
velvetleaf
Abutilon theophrasti
white bryony
Byronia alba
yellow nutsedge
Cyperus esculentus
yellow starthistle
Centaurea solstitialis
yellowflag iris
Iris pseudacorus

weeds of concern

The Weed Board's Most Wanted Weeds

FCWB Logo
White Bryony

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

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