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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 Name Common Namesort icon Type Subtype Extent Risk of Introduction First Source
Capsella bursa-pastoris shepard's purse plant herbaceous widespread n/a (already in CA) Weeds of CA
Capripoxvirus sppv Sheep pox virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Hemicycliophora arenaria sheath nematode invertebrate nematode unknown n/a (already in CA) CDFA (reg. A)
Kickxia elatine sharpleaf cancerwort plant herbaceous widespread n/a (already in CA) Weeds of CA
Alternanthera sessilis sessile joyweed plant herbaceous not present moderate USDA Plant/Pest
Nassella trichotoma serrated tussock plant grass not present low USDA Plant/Pest
Euphorbia serrata serrate spurge plant herbaceous not present moderate CDFA
Lespedeza cuneata sericea lespedeza plant herbaceous not present moderate CO Weed List
Poicephalus senegalus Senegal parrot vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Fusarium fuliginosporum Seeding Disease/seedling rot of Deodar cedar disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ficopomatus enigmaticus Sea worms invertebrate other limited n/a (already in CA) Exoticsguide
Didemnum vexillum Sea squirt invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Chionaspis furfura scurfy scale arthropod scale, aphid not present high CDFA (reg. A)
Cochliomyia hominivorax screwworm arthropod fly not present low CDFA (reg. A)
Onopordum acanthium Scotch thistle plant herbaceous limited n/a (already in CA) CDFA
Cronartium flaccidum Scotch Pine Blister Rust disease fungus not present low USDA Plant/Pest
Cytisus scoparius Scotch broom plant woody widespread n/a (already in CA) CDFA
Gremmeniella abietina Scleroderris Canker disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Tripleurospermum perforatum scentless false mayweed plant herbaceous not present low CO Weed List
Anthemis arvensis scentless chamomile plant herbaceous limited n/a (already in CA) CO Weed List
Anomala foraminosa scarab beetle arthropod beetle not present low CDFA (reg. A)
Anomala insitiva scarab beetle arthropod beetle not present low CDFA (reg. A)
Anomala luteipennis scarab beetle arthropod beetle not present low CDFA (reg. A)
Anomala undulata scarab beetle arthropod beetle unknown low CDFA (reg. A)
Popillia lewisi scarab beetle arthropod beetle not present high CDFA (reg. A)
Callipepla squamata Scaled quail vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Satsuma dwarf virus, Sadwa virus SDV Satsuma dwarf virus disease virus not present VALUE REQUIRED No list
Leucoma salicis satin moth arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Sargassum muticum Sargassum muticum plant algae limited low Hoffman NOAA
Anastrepha serpentina sapote fruit fly arthropod fly limited n/a (already in CA) CDFA (reg. A)
Parlatoria proteus sanseveria scale arthropod scale, aphid not present high CDFA (reg. A)
Sampaguita Yellow Ringspot Mosaic Agent Sampaguita Yellow Ringspot Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cervus unicolor Sambar deer vertebrate mammal VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Spartina patens saltmeadow cord grass plant grass limited n/a (already in CA) Cal-IPC list
Tamarix ramosissima saltcedar plant woody widespread n/a (already in CA) Cal-IPC list
Tamarix chinensis salt cedar plant woody limited n/a (already in CA) CO Weed List
Polygonum sachalinense Sakhalin knotweed plant herbaceous limited n/a (already in CA) CDFA
Brassica tournefortii Saharan mustard plant herbaceous limited n/a (already in CA) Cal-IPC list
Sicalis flaveola Saffron finch vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Threskiornis aetheopicus Sacred Ibis vertebrate bird not present high Cal Code 14:671
Orconectes rusticus Rusty crayfish invertebrate crustaceans and tunicates not present high NISIC
Gymnosporangium asiaticum Rust: Pear and Juniper disease fungus not present VALUE REQUIRED APHIS OPIS
Puccinia mccleanii Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pucciniastrum actinidae Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces gladioli Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces nyikensis Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromycladium tepperianum Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Salsola tragus Russian-thistle plant herbaceous widespread n/a (already in CA) CDFA
Elaeagnus angustifolia Russian-olive plant woody limited n/a (already in CA) Cal-IPC list
Halimodendron halodendron Russian salttree plant woody not present moderate CDFA
Acroptilon repens Russian knapweed plant herbaceous widespread n/a (already in CA) MT Weed List
Chondrilla juncea rush skeletonweed plant herbaceous limited n/a (already in CA) CDFA
Selenaspidus articulatus rufous scale arthropod scale, aphid not present moderate CDFA (reg. A)
Gymnocephalus cernuus Ruffe vertebrate fish not present moderate Harmful U.S. NIS
Scardinius erythropthalmus Rudd vertebrate fish not present high Harmful U.S. NIS
Phytoplasma rus Rubus stunt disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Neogobius melanostomus Round goby vertebrate fish not present moderate NISIC
Cyrtopodion scabrum Rough-tailed gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Littorina saxatilis Rough periwinkle invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Aeschynomene rudis rough jointvetch plant woody limited n/a (already in CA) CDFA
Symphytum asperum rough comfrey plant herbaceous limited n/a (already in CA) CDFA
Hypochaeris radicata rough catsear plant herbaceous widespread n/a (already in CA) Cal-IPC list
Pseudopezicula tracheiphila Rotbrenner disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Dasineura rhodophaga rose midge arthropod fly limited n/a (already in CA) CDFA (reg. B)
Trifolium hirtum rose clover plant herbaceous widespread n/a (already in CA) Cal-IPC list
Macrodactylus subspinosus rose chafer arthropod beetle not present high CDFA (reg. A)
Pratylenchus coffeae root-lesion nematode invertebrate nematode unknown moderate CDFA (reg. C)
Phytophthora cinnamomi Root Rot disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Leptographium truncatum Root Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Capreolus capreolus Roe deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Bromus diandrus ripgut brome plant grass widespread n/a (already in CA) Cal-IPC list
Rana berlandieri Rio Grande leopard frog vertebrate amphibian VALUE REQUIRED VALUE REQUIRED DFG Code 2118
Tarentola annularis Ringed wall gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Pseudocheirus peregrinus Ring-tailed possum vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Psittacula krameri Ring-necked parakeet vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Morbillivirus RBOK Rinderpest virus disease virus not present VALUE REQUIRED Chavarria NRDC
Phlebovirus rvfv Rift Valley Fever disease virus VALUE REQUIRED VALUE REQUIRED CIDRAP
Apamea apamiformis riceworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Sobemovirus rymv Rice Yellow Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma ryd-mlo Rice Yellow Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Tenuivirus rwsv Rice Wilted Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Waikavirus rtsv Rice Tungro Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Scotinophara lurida rice stinkbug arthropod scale, aphid not present high CDFA (reg. A)
Oebalus pugnax rice stink bug arthropod scale, aphid not present high CDFA (reg. A)
Chilo plejadellus rice stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Leptocorisa acuta rice seed bug arthropod scale, aphid not present moderate USDA Plant/Pest
Corcyra cephalonica rice moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Phytoreovirus rgdv Rice Gall Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoreovirus rdv Rice Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Sogatodes orizicola rice delphacid arthropod scale, aphid not present moderate CDFA (reg. A)
Pyricularia grisea Rice Blast disease fungus limited n/a (already in CA) APSNet
Echinochloa phyllopogon rice barnyardgrass plant grass limited n/a (already in CA) Weeds of CA
Geukensia demissa Ribbed horsemussel invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Chrysomyxa ledi var. rhododendri Rhododendron-spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytophthora kernoviae Rhododendron Phytopthora disease disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Massileurodes chittendeni rhodendron whitefly arthropod scale, aphid not present high CDFA (reg. A)
Macaca mulatto Rhesus monkey vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Reoviridae-related pathogenic virus (REO-III, REO-IV) Reo-like viruses disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Rotylenchulus reniformis Reniform Nematode invertebrate nematode not present moderate CDFA (reg. A)
Syrmaticus reevesii Reeve’s pheasant vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al