California Code of Regulations
Title 3 - Food and Agriculture
Division 4 - Plant Industry
Chapter 6 - Weed Free Areas and Weed Eradication Areas
Subchapter 6 - Noxious Weed Species
Section 4500 - Noxious Weed Species
It has been determined that the following species of plants are noxious weeds within the meaning of Section 5004 of the Food and Agricultural Code:
Acacia paradoxa (Kangaroo thorn)
Acaena anserinifolia (biddy biddy)
Acaena novae-zelandiae (biddy biddy)
Acaena pallida (biddy biddy)
Acroptilon repens (=Rhaponticum r.) (Russian knapweed)
Aegilops cylindrica (jointed goatgrass)
Aegilops ovata (ovate goatgrass)
Aegilops triuncialis (barb goatgrass)
Aeschynomene spp. (joint-vetch)
Alhagi maurorum (camelthorn)
Ailanthus altissima (tree of heaven)
Allium paniculatum (panicled onion)
Allium vineale (wild garlic)
Alternanthera philoxeroides (alligatorweed)
Alternanthera sessilis (sessile joyweed)
Ambrosia trifida (giant ragweed)
Araujia sericifera (bladderflower)
Arctotheca calendula (capeweed, as seed or fertile plants)
Arundo donax (giant reed)
Asphodelus fistulosus (onionweed)
Atriplex amnicola (swamp saltbush)
Berteroa incana (hoary alyssum)
Brachypodium sylvaticum (slender false-brome)
Cabomba caroliniana (Carolina fanwort)
Carduus acanthoides (plumeless thistle)
Carduus crispus (curly plumeless thistle)
Carduus nutans (musk thistle)
Carduus pycnocephalus (slender-flowered thistle)
Carduus tenuiflorus (Italian thistle)
Carthamus baeticus (smooth distaff thistle)
Carthamus lanatus (woolly distaff thistle)
Carthamus leucocaulos (whitestem distaff thistle)
Cenchrus echinatus (southern sandbur)
Cenchrus incertus (coast sandbur)
Cenchrus longispinus (mat sandbur)
Centaurea calcitrapa (purple starthistle)
Centaurea diffusa (diffuse knapweed)
Centaurea iberica (Iberian starthistle)
Centaurea jacea s.l. (including C. pratensis, C. nigra, and C. nigrescens) (meadow knapweed, black knapweed, brown knapweed)
Centaurea melitensis (tocalote)
Centaurea solstitialis (yellow starthistle)
Centaurea squarrosa (squarrose knapweed)
Centaurea stoebe (=C. maculosa) (spotted knapweed)
Centaurea sulphurea (Sicilian starthistle)
Ceratopteris thalictroides (watersprite)
Chondrilla juncea (skeletonweed)
Chorispora tenella (purple mustard)
Cirsium arvense (Canada thistle)
Cirsium japonicum (Japanese thistle)
Cirsium ochrocentrum (yellowspine thistle)
Cirsium undulatum (wavyleaf thistle)
Cirsium vulgare (bull thistle)
Coincya monensis (star-mustard)
Convolvulus arvensis (field bindweed)
Cortaderia jubata (jubata grass)
Crupina vulgaris (bearded creeper)
Cucumis melo var. dudaim (dudaim melon)
Cucumis myriocarpus (paddy melon)
Cuscuta spp. (dodder)
Cynara cardunculus (artichoke thistle)
Cyperus esculentus (yellow nutsedge)
Cyperus rotundus (purple nutsedge)
Cytisus scoparius (Scotch broom)
Diodia virginiana (buttonweed)
Dittrichia graveolens (stinkweed)
Drymaria cordata (whitesnow, tropical chickweed)
Egeria najas (anacharis)
Elymus repens (=Elytrigia repens) (quackgrass)
Euphorbia esula (leafy spurge)
Euphorbia graminea (grassleaf spurge)
Euphorbia dendroides (tree spurge)
Euphorbia oblongata (oblong spurge)
Euphorbia serrata (serrate spurge)
Euphorbia terracina (carnation spurge)
Fallopia x bohemica (=Reynoutria x bohemica; Polygonum x bohemica) (Bohemian knotweed)
Fallopia japonica (=Polygonum cuspidatum; Reynoutria j.) (Japanese knotweed)
Fallopia sachalinensis (=Polygonum s.; Reynoutria s.) (giant knotweed)
Fatoua villosa (hairy crabweed)
Galega officinalis (Goatsrue)
Genista monspessulana (French broom)
Halimodendron halodendron (Russian salt tree)
Halogeton glomeratus (halogeton)
Helianthus ciliaris (blueweed)
Heteropogon contortus (tanglehead)
Hydrilla verticillata (hydrilla)
Hydrocharis morsus-ranae (Frogbit)
Hygrophila polysperma (Indian swampweed)
Hyoscyamus niger (black henbane)
Hypericum canariense (Canary Island St. Johnswort)
Hypericum perforatum (Klamath weed)
Isatis tinctoria (dyer's woad)
Lagarosiphon major (oxygen weed, African elodea)
Lepidium appellanum (=Cardaria appellanum) (globe-podded hoary cress)
Lepidium chalepensis (=Cardaria chalepensis) (lens-podded hoary cress)
Lepidium coronopus (=Coronopus squamatus) (swinecress)
Lepidium draba (=Cardaria draba) (heart-podded hoary cress)
Lepidium latifolium (perennial peppercress)
Leptochloa chinensis (=Dinebra c.) (Chinese sprangletop)
Limnobium laevigatum (South American spongeplant)
Limnobium spongia (American spongeplant, American frog's-bit)
Limnophila indica (Indian marshweed)
Limnophila sessiliflora (Asian marshweed)
Linaria dalmatica (Dalmatian toadflax)
Ludwigia decurrens (winged water-primrose)
Ludwigia hexapetala (water-primrose)
Ludwigia peruviana (Peruvian primrose-willow)
Lythrum salicaria (purple loosestrife)
Mercurialis ambigua (Spanish mercury)
Muhlenbergia schreberi (nimblewill)
Myosoton aquaticum (giant chickweed)
Nothoscordum gracile (false garlic)
Nymphaea mexicana (banana waterlily)
Nymphoides peltata (yellow floating heart)
Oenothera xenogaura (=Gaura drummondii) (Drummond's gaura)
Oenothera sinuosa (=Gaura sinuata) (wavyleaf gaura)
Ononis alopecuroides (foxtail restharrow)
Onopordum spp. (including Scotch thistle, Illyrian thistle and Taurian thistle)
Orobanche ramosa (branched broomrape)
Oryza rufipogon (red rice)
Panicum antidotale (blue panicgrass)
Parthenium hysterophorus (Santa Maria feverfew)
Peganum harmala (harmel)
Persicaria wallichii (=P. polystachyum; Rubrivena polystachya) (Himalayan knotweed)
Pennisetum clandestinum (Kikuyugrass)
Physalis virginiana var. sonorae (smooth groundcherry)
Physalis viscosa (grape groundcherry)
Potentilla recta (sulphur cinquefoil)
Prosopis strombulifera (creeping mesquite)
Retama monosperma (bridal veil broom)
Rhagadiolus stellatus (star endive)
Rorippa austriaca (Austrian fieldcress)
Rorippa sylvestris (creeping yellowcress)
Saccharum ravennae (=Tripidium r.) (ravennagrass)
Salsola tragus (common Russianthistle)
Salsola collina (spineless Russian thistle)
Salsola damascena (=S. vermiculata) (wormleaf salsola)
Salsola paulsenii (barbwire Russianthistle)
Salvia aethiopis (Mediterranean sage)
Salvia virgata (meadow sage)
Salvinia auriculata s.l. (giant salvinia)
Scolymus hispanicus (golden thistle)
Senecio jacobaea (=Jacobaea vulgaris) (tansy ragwort)
Senecio linearifolius (fireweed groundsel)
Senecio squalidus (Oxford ragwort)
Sesbania punicea (red sesbania, rattlebox)
Setaria faberi (giant foxtail)
Solanum cardiophyllum (heartleaf nightshade)
Solanum carolinense (Carolina horsenettle)
Solanum dimidiatum (Torrey's nightshade)
Solanum elaeagnifolium (white horsenettle)
Solanum lanceolatum (lanceleaf nightshade)
Solanum marginatum (white-margined nightshade)
Sonchus arvensis (perennial sowthistle)
Sorghum halepense (Johnsongrass and other perennial Sorghum spp. including but not limited to Sorghum almum and perennial sweet sudangrass)
Spartina alterniflora and hybrids (smooth cordgrass and hybrids)
Spartina anglica (common cordgrass)
Spartina densiflora (dense-flowered cordgrass)
Spartina patens (saltmeadow cord grass)
Spartium junceum (Spanish broom)
Sphaerophysa salsula (Austrian peaweed)
Stipa brachychaeta (=Achnatherum b.; Amelichloa b.) (punagrass)
Striga lutea (witchweed)
Symphytum asperum (rough comfrey)
Taeniatherum caput-medusae (medusahead)
Tagetes minuta (wild marigold)
Tamarix chinensis (salt cedar)
Tamarix gallica (salt cedar)
Tamarix parviflora (salt cedar)
Tamarix ramosissima (salt cedar)
Tribolium obliterum (Capegrass)
Tribulus terrestris (puncture vine)
Ulex europaeus (gorse)
Viscum album (European mistletoe)
Volutaria canariensis (Canary Island knapweed)
Zostera japonica (dwarf eelgrass)
Zygophyllum fabago (Syrian beancaper)
This regulation shall in no way restrict the designation of a weed pest to those species listed herein.
Note: Authority cited: Sections 407 and 5004, Food and Agricultural Code. Reference: Section 5004, Food and Agricultural Code.
Note: Authority cited: Sections 407 and 5004, Food and Agricultural Code. Reference: Section 5004, Food and Agricultural Code.
