APPENDIX A

CONTRA COSTA COUNTY LIST OF NOXIOUS WEEDS

Rating	Genus	Species	Common Name	Pest Category
C	Malvella	leprosa	alkali sida	Broadleaf
B	Cynara	cardunculus	artichoke thistle	Perennial
B	Aegilops	triuncialis	barb goatgrass	Grass
C	Cynodon	spp.	bermudagrass	Grass
C	Salsola	tragus	common Russianthistle	Perennial
C	Convolvulus	arvensis	field bindweed	Broadleaf
C	Genista	monspessulana	French broom	Broadleaf
B	Cardaria	pubescens	Globe-podded hoarycress	Broadleaf
B	Cardaria	draba	heart-podded hoarycress	Broadleaf
C	Carduus	pycnocephalus	Italian thistle	Broadleaf
C	Sorghum	halepense	Johnsongrass	Grass
C	Hypericum	perforatum	Klamathweed	Broadleaf
B	Cardaria	chalepensis	lens-podded hoarycress	Broadleaf
C	Taeniatherum	caput-medusae	medusahead	Broadleaf
B	Euphorbia	oblongata	oblong spurge	Broadleaf
B	Lepidium	latifolium	perennial peppercress	Broadleaf
C	Tribulus	terrestris	puncturevine	Broadleaf
B	Lythrum	salicaria	purple loosestrife	Broadleaf
B	Centaurea	calcitrapa	purple starthistle	Perennial
B	Elytrigia	repens	quackgrass	Grass
B	Acroptilon	repens	Russian knapweed	Broadleaf
C	Cytisus	scoparius	Scotch broom	Broadleaf
C	Carduus	tenuiflorus	slenderflowered thistle	Broadleaf
B	Solanum	elaeagnifolium	white horsenettle	Broadleaf
B	Cyperus	esculentus	yellow nutsedge	Perennial
C	Centaurea	solstitialis	yellow starthistle	Perennial
Non-rated	Centaurea	melitensis	Malta starthistle	Perennial
Non-rated	Acacia	melanoxylon	black acacia	Perennial
Non-rated	Cirsium	vulgare	bullthistle	Broadleaf
B	Cyperus	rotundus	purple nutsedge	Broadleaf
Non-rated	Egeria	densa	brazilian elodea	Floating/Submersed
Non-rated	Elodea	canadensis	common elodea	Floating/Submersed
Non-rated	Senecio	vulgaris	Common groundsel	Broadleaf
Non-rated	Solanum	nigrum	Black nightshade	Broadleaf
Non-rated	Polygonum	lapathifolium	Smartweed	Hydrophyte
Non-rated	Eichhornia	crassipes	Water Hyacinth	Floating/Submersed
Non-rated	Myriophyllum	spicatum	Eurasian Milfoil	Floating/Submersed
N/A	Spermophilus	beecheyi	Ground Squirrel	Burrowing Rodent
N/A	Thomomys	bottae	Gopher	Burrowing Rodent
N/A	Vespula	germanica	Yellowjacket	Nuisance Pest
N/A	Dolichovespula	maculata	Hornet	Nuisance Pest
N/A	Vespula	vulgaris	Wasp	Nuisance Pest
Non-rated	Nicotianna	glauca	Tobacco Tree	Tree
N/A	Apis	melifera	Honey Bee	Nuisance Pest
Non-rated	Quercus	multiple	Oak Tree	Tree
Non-rated	Salix	lasiolepis	Willow Tree	Tree
Non-rated	Toxicodendron	diversilobum	Poison Oak	Tree
Non-rated	Rubus	ursinus	Blackberry	Shrub
Non-rated	Various	various	Blue Green Algae (Cyanobacteria)	Algae
Non-rated	Typha	latifolia	Cattail	Hydrophyte

Ratings:

“B” An organism of known economic importance subject to: eradication, containment, control or other holding action at the discretion of the individual country agricultural commission. OR

An organism of known economic importance subject to state endorsed holding action and eradication only when found in a nursery.

“C” An organism subject to no state enforced action outside of nurseries except to retard spread. At the discretion of the commissioner.

“N/A” – Not Applicable