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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
Cydia caryana hickory shuckworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Cyclaneusma minus Cyclaneusma Needle Cast disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Cuscuta spp. (C. japonica, reflexa, australia, monogyna) Dodder (non-native spp.) plant herbaceous limited n/a (already in CA) CDFA
Cuscuta reflexa giant dodder plant herbaceous not present low CDFA
Cuscuta monogyna Eastern Dodder plant herbaceous not present low No list
Cuscuta japonica Japanese dodder plant herbaceous limited n/a (already in CA) CDFA
Cuscuta australis Australian dodder plant herbaceous not present low CDFA
Cuscuta approximata smoothseed alfalfa dodder plant herbaceous limited n/a (already in CA) WA Weed List
Curtovirus CTVCP Curly top virus disease virus widespread n/a (already in CA) CDFA (reg. A)
Curculio nucum hazelnut weevil arthropod beetle not present high USDA Plant/Pest
Curculio elephas chestnut weevil arthropod beetle not present high USDA Plant/Pest
Curculio caryae pecan weevil arthropod beetle not present moderate CDFA (reg. A)
Cuon alpinus Indian wild dog / Dhole vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Cucumis myriocarpus paddy melon plant herbaceous limited n/a (already in CA) CDFA
Cucumis melo var. duriam dudaim melon plant herbaceous limited n/a (already in CA) CDFA
Ctenosaura similis Black spinytail iguana vertebrate reptile not present high Cal Code 14:671
Ctenosaura pectinata Mexican spinytail iguana vertebrate reptile not present moderate Cal Code 14:671
Cryptosula pallasiana Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Cryptorhynchus mangiferae mango seed weevil arthropod beetle not present low USDA Plant/Pest
Cryptophlebia leucotreta false codling moth arthropod butterfly, moth not present high CDFA (reg. A)
Cryptocotyle lingua Black Spot parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Cryptoblepharus poecilopleurus Pacific snake-eyed skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cryphonectria parasitica Chestnut blight disease fungus not present high ISSG Global InvS
Crupina vulgaris common crupina plant herbaceous limited n/a (already in CA) CDFA
Cronartium ribicola White pine blister rust disease fungus limited n/a (already in CA) ForestPests.org
Cronartium flaccidum Scotch Pine Blister Rust disease fungus not present low USDA Plant/Pest
Crocosmia x crocosmiiflora montbretia plant herbaceous limited n/a (already in CA) Cal-IPC list
Crisicoccus azaleae azalea mealybug arthropod scale, aphid not present moderate CDFA (reg. B)
Crinivirus spcsv Sweetpotato Chlorotic Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Crinivirus pyvv Potato Yellow Vein Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Crinivirus CYSDV Cucurbit Yellow Stunting Disorder Virus disease virus limited moderate EPPO
Crinipellis perniciosa Witches Broom Fungus in cocoa disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cricetomys gambianus Gambian giant pouched rat vertebrate mammal not present low Cal Code 14:671
Crataegus monogyna hawthorn plant woody limited n/a (already in CA) Cal-IPC list
Crassula helmsii Australian swamp stonecrop plant herbaceous not present low WA Weed List
Coturnix coturnix Common quail vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Cotula coronopifolia brassbuttons plant herbaceous widespread n/a (already in CA) Cal-IPC list
Cotoneaster pannosus silverleaf cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster lacteus Parney's cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster franchetii orange cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cortaderia selloana pampasgrass plant grass widespread n/a (already in CA) Cal-IPC list
Cortaderia jubata jubatagrass plant grass widespread n/a (already in CA) Cal-IPC list
Coronopus squamatus swinecress plant herbaceous limited n/a (already in CA) CDFA
Cornuvesica falcata New Zealand wood rot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cordyline australis giant dracaena plant herbaceous limited n/a (already in CA) Cal-IPC list
Cordyceps spp. Fungal Disease of Bees disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Corcyra cephalonica rice moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Corbula amurensis Overbite clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Corbicula fluminea Asian clam invertebrate aquatic mollusk, freshwater widespread n/a (already in CA) ANSTF
Corbicula fluminalis Corbicula fluminalis invertebrate aquatic mollusk, freshwater limited n/a (already in CA) ANSTF
Copturus aguacatae avocado stem weevil arthropod beetle not present high USDA Plant/Pest
Copsychus malabaricus White-rumped shama vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Conyza bonariensis asthmaweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Convolvulus arvensis field bindweed plant herbaceous widespread n/a (already in CA) CDFA
Contarinia johnsoni grape blossum midge arthropod fly not present low CDFA (reg. A)
Conotrachelus spp. hidden snout weevils arthropod beetle not present moderate USDA Plant/Pest
Conotrachelus retentus black walnut curculio arthropod beetle not present moderate CDFA (reg. A)
Conotrachelus perseae small seed weevil arthropod beetle not present high CDFA (reg. A)
Conotrachelus nenuphar plum curculio arthropod beetle not present high CDFA (reg. A)
Conotrachelus juglandis butternut curculio arthropod beetle not present moderate CDFA (reg. A)
Conotrachelus aguacatae small avocado seed weevil arthropod beetle not present high USDA Plant/Pest
Conopomorpha litchiella lychee leaf miner arthropod butterfly, moth not present low CDFA (reg. A)
Conopomorpha cramerella cocoa pod borer arthropod butterfly, moth not present low USDA Plant/Pest
Conogethes punctiferalis yellow peach moth arthropod butterfly, moth not present moderate USDA Plant/Pest
Conoderus rufangulus Conoderus rufangulus arthropod beetle not present high USDA Plant/Pest
Conium maculatum poison-hemlock plant herbaceous widespread n/a (already in CA) Cal-IPC list
Coniothyrium spp. canker in elm disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Conicosia pugioniformis narrowleaf iceplant plant herbaceous limited n/a (already in CA) Cal-IPC list
Comovirus rcmv Red Clover Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Comovirus of unknown genus Andean Potato Mottle Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Commelina benghalensis Benghal dayflower plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Columba livia Feral pigeon vertebrate bird widespread high Witmer et al
Colletotrichum coffeanum Brown Blight disease fungus not present low USDA Plant/Pest
Coelioxys spp. cuckoo bees arthropod bee, wasp not present low USDA Plant/Pest
Cocoa Swollen Shoot Virus Cocoa Swollen Shoot Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cochliomyia hominivorax screwworm arthropod fly not present low CDFA (reg. A)
Cochliobolus miyabeanus Brown Spot of Rice disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Coccus viridis Green scale arthropod scale, aphid not present high CDFA (reg. A)
Coccotorus scutellaris plum gouger arthropod beetle not present moderate CDFA (reg. A)
Cocadviroid cccvd Coconut Cadang-Cadang Viroid disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cnemidophorus velox Plateau striped whiptail vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cnemidophorus neomexicanus New Mexico whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Cnemidophorus motaguae Giant whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Cnemidophorus lemniscatus Rainbow whiptail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Closterovirus wylv or Prosopis fiebrigii ? Wheat Yellow Leaf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Closterovirus CTV Citrus tisteza virus disease virus limited moderate APHIS OPIS
Closteroviridae byvd Blackberry Yellow Vein Disease disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Clethrionomys rutilus Red-backed vole vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Clematis vitalba old man's beard plant herbaceous limited n/a (already in CA) OR Weed List
Clematis orientalis Chinese clematis plant herbaceous not present high CO Weed List
Claviceps spp. Sorghum Ergot disease fungus limited VALUE REQUIRED APHIS OPIS
Clavaspis herculeana herculeana scale arthropod scale, aphid not present high CDFA (reg. A)
Clathria polifera Red beard sponge invertebrate other limited n/a (already in CA) Exoticsguide
Clarias batrachus Walking catfish vertebrate fish not present moderate Cal Code 14:671
Cladophora spp. green algae plant algae limited VALUE REQUIRED Hoffman NOAA
Cirsium vulgare bull thistle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Cirsium undulatum wavyleaf thistle plant herbaceous limited n/a (already in CA) CDFA
Cirsium ochrocentrum yellowspine thistle plant herbaceous limited n/a (already in CA) CDFA
Cirsium japonicum Japanese thistle plant herbaceous not present low CDFA
Cirsium arvense Canada thistle plant herbaceous widespread n/a (already in CA) CDFA