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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
Pennisetum clandestinum kikuyugrass plant grass widespread n/a (already in CA) OR Weed List
Pennisetum macrourum African feathergrass plant grass not present low USDA Plant/Pest
Pennisetum pedicellatum Kyasumagrass plant grass not present low USDA Plant/Pest
Pennisetum polystachion missiongrass plant grass not present low USDA Plant/Pest
Pennisetum setaceum crimson fountaingrass plant grass widespread n/a (already in CA) Cal-IPC list
Pennisetum villosum feathergrass plant grass limited n/a (already in CA) No list
Perdix perdix Grey partridge vertebrate bird VALUE REQUIRED VALUE REQUIRED Harmful U.S. NIS
Peronosclerospora maydis Downy Mildew of Corn/ Select agent disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Peronosclerospora philippinensis (aka, sacchari) Philippine Downy mildew of sorghum/Select Agent disease oomycete not present VALUE REQUIRED No list
Peronosclerospora sacchari (philippinensis) Sugarcane Downy Mildew disease fungus not present low USDA Plant/Pest
Pestalotiopsis disseminata Parasitic Leaf Fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pestivirus CSFV strain Brescia Classical swine fever virus (strain Brescia) disease virus not present VALUE REQUIRED CDFA AHFSS
Phacidiopycnis pseudotsuga Douglas Fir Canker disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phaeoramularia angolensis Phaeoramularia Fruit and Leaf Spot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phakopsora meibomiae soybean rust disease fungus not present high APHIS OPIS
Phakopsora pachyrhizi Asian soybean Rust disease fungus not present low National IS Info
Phalaris aquatica hardinggrass plant grass widespread n/a (already in CA) Cal-IPC list
Phalaris arundinacea reed canarygrass plant grass limited n/a (already in CA) WA Weed List
Phascogale spp. Brush-tailed marsupial mouse vertebrate mammal VALUE REQUIRED VALUE REQUIRED OR ISC Worst 100
Phasianus colchicus Common pheasant vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Phellinus noxius Brown root rot disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Phellinus senex Stem decay disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Phelsuma guimbeaui Orange-spotted day gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Phelsuma laticauda Gold dust day gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Phelsuma madagascariensis Giant day gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Phenococcus aceris apple mealybug arthropod scale, aphid not present high CDFA (reg. A)
Phenococcus manihoti cassava mealybug arthropod scale, aphid not present moderate USDA Plant/Pest
Phialophora cinerescens Phialophora wilt of carnations and strawberries disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phlebia chrysocrea Wood decay disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Phlebovirus rvfv Rift Valley Fever disease virus VALUE REQUIRED VALUE REQUIRED CIDRAP
Phloeotribus liminarius peach bark beetle arthropod beetle not present high CDFA (reg. B)
Phoenix canariensis Canary Island date palm plant woody limited n/a (already in CA) No list
Phoma tracheiphila Mal Secco disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phomopsis vaccinii Phomopsis soft rot disease fungus not present moderate Mycologia
Phoracantha spp. eucalyptus (longhorned) borer arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Phragmites australis common reed plant grass limited n/a (already in CA) Cal-IPC list
Phrynosoma cornutum Texas horned lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Phyllody Agent Phyllody Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phyllophaga congrua May beetle arthropod beetle not present moderate CDFA (reg. A)
Phyllophaga spp. white grubs arthropod beetle limited n/a (already in CA) USDA Plant/Pest
Phyllosticta colocasiophila Phyllosticta Leafspot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phylloxera devastatrix pecan phylloxera arthropod scale, aphid not present moderate CDFA (reg. A)
Physalis longifolia long-leaf groundcherry plant herbaceous not present moderate CDFA
Physalis viscosa grape groundcherry plant herbaceous limited n/a (already in CA) CDFA
Physoderma zeae-maydis Brown Spot of Corn disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytalus spp. white grubs arthropod beetle limited n/a (already in CA) USDA Plant/Pest
Phytolacca americana common pokeweed plant herbaceous widespread n/a (already in CA) Cal-IPC list
Phytomyza ilicicola native holly leafminer arthropod fly limited n/a (already in CA) CDFA (reg. B)
Phytomyza ilicis holly leafminer arthropod fly limited n/a (already in CA) CDFA (reg. B)
Phytophthora alni Alder Phytophthora disease oomycete not present moderate APHIS OPIS
Phytophthora alni Alder Phytophthora disease fungus not present low NAPPO
Phytophthora cinnamomi Root Rot disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Phytophthora fragariae Red Stele disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytophthora infestans Late Blight disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Phytophthora kernoviae Rhododendron Phytopthora disease disease oomycete VALUE REQUIRED VALUE REQUIRED No list
Phytophthora quercina Oak disease disease oomycete VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytophthora ramorum Sudden oak death disease oomycete limited n/a (already in CA) APHIS OPIS
Phytoplasma bn Black wood disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma eay European Aster Yellows disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma esfy European Stone Fruit Yellows disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma fd Flavescence doree disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma md Mulberry Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma parastolbur-mlo Parastolbur disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma rus Rubus stunt disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma ryd-mlo Rice Yellow Dwarf disease phytoplasma VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Phytoplasma scwl Sugarcane White Leaf Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoplasma ulmi Elm yellows disease phytoplasma VALUE REQUIRED VALUE REQUIRED No list
Phytoreovirus rdv Rice Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phytoreovirus rgdv Rice Gall Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Picris echioides bristly oxtongue plant herbaceous widespread n/a (already in CA) Cal-IPC list
Picris hieracioides hawkweed oxtongue plant herbaceous not present moderate WA Weed List
Pinnaspis buxi boxwood scale arthropod scale, aphid not present high CDFA (reg. A)
Pinnaspis strachani lesser snow scale arthropod scale, aphid not present high CDFA (reg. A)
Piptatherum miliaceum smilograss plant grass widespread n/a (already in CA) Cal-IPC list
Pissodes nemorensis eastern pine weevil arthropod beetle not present high CDFA (reg. A)
Pittosporum undulatum Victorian box plant woody limited n/a (already in CA) Med. plants list
Planococcus ficus vine mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Planococcus lilacinus coffee mealybug arthropod scale, aphid not present high CDFA (reg. A)
Planococcus minor (Maskell) Passionvine mealybug arthropod scale, aphid not present high CDFA (reg. A)
Plantago lanceolata buckhorn plantain plant herbaceous widespread n/a (already in CA) Cal-IPC list
Plasmodium falciparum Malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plasmodium knowlesi Malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plasmodium malariae Malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plasmodium ovale Malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plasmodium relictum Avian malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plasmodium vivax Malaria disease protist VALUE REQUIRED VALUE REQUIRED CIDRAP
Plathypena scabra green cloverworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Pleistophora hyphessobryconis Neon-tetra disease of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Plum Bark Split Virus Plum Bark Split Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Poa pratensis Kentucky bluegrass plant grass widespread n/a (already in CA) Cal-IPC list
Podarcis muralis Common wall lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Podarcis sicula Italian wall lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Poicephalus senegalus Senegal parrot vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Poliaspis cycadis Poliaspis cycad scale arthropod scale, aphid not present high CDFA (reg. A)
Polygonum arenastrum oval leaf knotweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Polygonum cuspidatum Japanese knotweed plant woody limited n/a (already in CA) CDFA
Polygonum polystachyum Himalayan knotweed plant herbaceous limited n/a (already in CA) CDFA
Polygonum sachalinense Sakhalin knotweed plant herbaceous limited n/a (already in CA) CDFA
Polygonum x bohemicum Bohemian knotweed plant herbaceous not present moderate WA Weed List
Polypogon monspeliensis and subspp. rabbitfoot polypogon plant grass widespread n/a (already in CA) Cal-IPC list