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CISAC has compiled the list below of over 1,700 species known to be invasive in California or a potential threat for introduction to the state. Please use the comment form below to let us know about: taxa that should be added or removed; species information that you would change; and species that you think should be a high priority for having a scorecard completed (choose Review Scorecards to see the list of scorecards already drafted). Make sure to click Save. Previous comments are displayed at the bottom of the page.

Download Species List (.csv) (to open in a Spreadsheet program)
This data download is provided to aid in the review of the draft invasive species list. We discourage other use of this data until it has been revised and finalized.

Scientific Namesort icon Common Name Type Subtype Extent Risk of Introduction First Source
Senecio jacobaea tansy ragwort plant herbaceous limited n/a (already in CA) CDFA
Senecio linearifolius narrowleaf ragwort plant herbaceous not present low CDFA
Senecio madagascariensis Madagascar ragwort plant herbaceous not present moderate USDA Plant/Pest
Senecio squalidus Oxford ragwort plant herbaceous not present low CDFA
Senecio vulgaris old-man-in-the-spring plant herbaceous widespread n/a (already in CA) Weeds of CA
Senna obtusifolia sicklepod plant herbaceous limited n/a (already in CA) CDFA
Septoria melanosa Elenk fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Serinus canaria Common canary vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Serinus mozambicus Yellow-fronted canary vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Serrasalminae Piranha vertebrate fish not present high FL FWCC NNS List
Sesamia cretica durra stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Sesbania punicea red sesbania plant woody limited n/a (already in CA) Cal-IPC list
Setaria faberi giant foxtail plant grass widespread n/a (already in CA) CDFA
Setaria pumila yellow foxtail plant grass widespread n/a (already in CA) Weeds of CA
Setaria pumila ssp. pallidefusca cattail grass plant grass not present moderate USDA Plant/Pest
Setaria viridis green bristlegrass plant grass widespread n/a (already in CA) Weeds of CA
Sicalis flaveola Saffron finch vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Silene latifolia ssp. alba bladder campion plant herbaceous limited n/a (already in CA) WA Weed List
Silybum marianum blessed milkthistle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Sinapis arvensis wild mustard plant herbaceous widespread n/a (already in CA) Cal-IPC list
Singhiella simplex Fig whitefly arthropod scale, aphid not present moderate FL Dept. of Ag
Sinoxylon anale dunnage beetle arthropod beetle not present high CDFA (reg. A)
Sirex noctilio sirex woodwasp arthropod bee, wasp not present moderate CDFA (reg. A)
Sirococcus clavigignenti-juglandacearum Butternut Canker disease fungus not present low ISSG Global InvS
Sisymbrium irio London rocket plant herbaceous widespread n/a (already in CA) Cal-IPC list
Siteroptes graminum grass mite arthropod mite limited n/a (already in CA) CDFA (reg. B)
Sitodiplosis mosellana wheat midge arthropod fly limited n/a (already in CA) CDFA (reg. A)
Sminthopsis spp. Narrow-footed marsupial mouse vertebrate mammal VALUE REQUIRED VALUE REQUIRED OR ISC Worst 100
Sminthurus viridus lucerne flea arthropod springtail not present low USDA Plant/Pest
Sobemovirus cmmv Cocksfoot Mild Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sobemovirus cnmov Cynosurus Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sobemovirus rymv Rice Yellow Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sogatodes orizicola rice delphacid arthropod scale, aphid not present moderate CDFA (reg. A)
Solanum cardiophyllum heartleaf nightshade plant herbaceous not present low CDFA
Solanum carolinense Carolina horsenettle plant herbaceous limited n/a (already in CA) CDFA
Solanum dimidiatum Torrey's nightshade plant herbaceous limited n/a (already in CA) CDFA
Solanum elaeagnifolium silverleaf nightshade plant herbaceous limited n/a (already in CA) CDFA
Solanum lanceolatum lanceleaf nightshade plant herbaceous limited n/a (already in CA) CDFA
Solanum marginatum white-margined nightshade plant woody limited n/a (already in CA) CDFA
Solanum nigrum black nightshade plant herbaceous widespread n/a (already in CA) Weeds of CA
Solanum physalifolium hoe nightshade plant herbaceous widespread n/a (already in CA) Weeds of CA
Solanum rostratum buffalobur plant herbaceous limited n/a (already in CA) ID Weed List
Solanum tampicense wetland nightshade plant woody not present low USDA Plant/Pest
Solanum torvum turkeyberry plant woody not present low USDA Plant/Pest
Solanum viarum tropical soda apple plant herbaceous not present low USDA Plant/Pest
Solenopsis geminata tropical fire ant arthropod bee, wasp not present high CDFA (reg. A)
Solenopsis invicta red imported fire ant arthropod bee, wasp limited n/a (already in CA) CDFA (reg. A)
Solenopsis richteri X Solenopsis invicta hybrid hybrid fire ant arthropod bee, wasp not present high CDFA (reg. A)
Solenopsis saevissima red imported fire ant arthropod bee, wasp not present moderate CDFA (reg. A)
Soliva sessilis lawnweed plant herbaceous widespread n/a (already in CA) WA Weed List
Sonchus arvensis perennial sowthistle plant herbaceous limited n/a (already in CA) CDFA
Sonchus oleraceaus common sowthistle plant herbaceous widespread n/a (already in CA) Weeds of CA
Sorghum almum Columbus grass plant grass not present moderate NV Weed List
Sorghum bicolor perennial sweet Sudan plant grass limited n/a (already in CA) NV Weed List
Sorghum halepense johnsongrass plant grass widespread n/a (already in CA) WA Weed List
Sorghum propinquum sorghum plant grass not present low NV Weed List
Soybean Dwarf Virus Soybean Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sparganium erectum exotic bur reed plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Spartina alterniflora smooth cordgrass and hybrids plant grass limited n/a (already in CA) Cal-IPC list
Spartina alterniflora x foliosa hybrids smooth cordgrass and hybrids plant grass limited n/a (already in CA) Cal-IPC list
Spartina anglica common cordgrass plant grass limited n/a (already in CA) Cal-IPC list
Spartina densiflora dense-flowered cordgrass plant grass limited n/a (already in CA) Cal-IPC list
Spartina patens saltmeadow cord grass plant grass limited n/a (already in CA) Cal-IPC list
Spartium junceum Spanish broom plant woody widespread n/a (already in CA) Cal-IPC list
Spermacoce alata winged false buttonweed plant herbaceous not present low USDA Plant/Pest
Spermophilus parryii Arctic ground squirrel vertebrate mammal widespread n/a (already in CA) Witmer et al
Sphaerodactylus argus Ocellated gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Sphaerodactylus elegans Ashy gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Sphaeroma quoyanum Isopod invertebrate crustaceans and tunicates VALUE REQUIRED VALUE REQUIRED NISIC
Sphaerophysa salsula Austrian peaweed plant herbaceous limited n/a (already in CA) CDFA
Sphaeropsis sapinea Diplodia Shoot Blight disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Sphenophorus maidis maize billbug arthropod beetle not present moderate CDFA (reg. A)
Spiroplasma citri Citrus stubborn disease disease spiroplasma limited VALUE REQUIRED CACASA
Spodoptera dolichos armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera eridania southern armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera exempta nutgrass armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera latifascia lateral lined armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera littoralis Egyptian cottonworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera mauritia lawn armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Spodoptera sunia Costa Rican armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Stellaria media common chickweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Steneotarsonemus ananas pineapple tarsonemid arthropod mite limited n/a (already in CA) CDFA (reg. B)
Steneotarsonemus spinki panicle rice mite arthropod mite not present high CDFA (reg. A)
Stenolechia bathrodyas juniper gelechiid arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Stenoma catenifer avocado seed moth arthropod butterfly, moth not present high CDFA (reg. A)
Stephanoderes hampei Coffee fungus disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Stereum hiugense White Rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sternochetus mangiferae mango seed weevil arthropod beetle not present moderate USDA Plant/Pest
Stigmina deflectans Needlecast Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Stipa capensis Mediterranean steppegrass plant grass limited n/a (already in CA) Cal-IPC list
Streptopelia chinensis Spotted dove vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Streptopelia decaocto Eurasian collared dove vertebrate bird not present high Cal Code 14:671
Streptopelia roseogrisea African collared dove vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Striga asiatica witchweed plant herbaceous not present moderate CDFA
Striga spp. witchweed plant herbaceous not present high USDA Plant/Pest
Sturnus roseus Pink starling vertebrate bird VALUE REQUIRED VALUE REQUIRED Lacey Act
Sturnus vulgaris European starling vertebrate bird widespread n/a (already in CA) Cal Code 14:671
Styela clava Club sea squirt invertebrate crustaceans and tunicates widespread n/a (already in CA) Exoticsguide
Sus scrofa Feral pig vertebrate mammal widespread n/a (already in CA) Cal Code 14:671
Sweetpotato chlorotic stunt virus Sweetpotato chlorotic stunt virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS