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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
Harrisina americana grapeleaf skeletonizer arthropod butterfly, moth not present high CDFA (reg. A)
Harrisina brillians western grapeleaf skeletonizer arthropod butterfly, moth widespread n/a (already in CA) CDFA (reg. B)
Hedera canariensis Algerian ivy plant woody widespread n/a (already in CA) Cal-IPC list
Hedera helix English ivy plant woody widespread n/a (already in CA) Cal-IPC list
Hedera hibernica English ivy plant woody not present high WA Weed List
Heilipus lauri avocado seed weevil arthropod beetle not present high CDFA (reg. A)
Helianthus ciliaris blueweed plant herbaceous limited n/a (already in CA) CDFA
Helichrysum petiolare licoriceplant plant woody limited n/a (already in CA) Cal-IPC list
Helicoverpa hawaiiensis Hawaiian bud moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Heliocoverpa armigera (Hübner) cotton bollworm arthropod butterfly, moth not present high CDFA (reg. A)
Hemiberlesia palmae tropical palm scale arthropod scale, aphid not present high CDFA (reg. A)
Hemicycliophora arenaria sheath nematode invertebrate nematode unknown n/a (already in CA) CDFA (reg. A)
Hemidactylus frenatus Common house gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Hemidactylus garnotti Indo-Pacific gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Hemidactylus mabouia Tropical house gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Hemidactylus platyurus Asian flat-tailed gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Hemidactylus turcicus Mediterranean gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Hemileia vastatrix Coffee Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Hemileia vastatrix Yellow ring mosaic agent (assoc. with Jasminum) disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Hemimene juliana nut fruit tortrix arthropod butterfly, moth not present low USDA Plant/Pest
Hemiphyllodactylus typus Indo-Pacific tree gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Hemitragus jemlahicus Himalayan tahr vertebrate mammal VALUE REQUIRED n/a (already in CA) DFG Code 2118
Heracleum mantegazzianum giant hogweed plant herbaceous not present high CDFA
Herpestes auropunctatus Small Indian mongoose vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Hesperis matronalis dame's rocket plant herbaceous limited n/a (already in CA) CO Weed List
Hieracium atratum polar hawkweed plant herbaceous not present low WA Weed List
Hieracium aurantiacum orange hawkweed plant herbaceous not present high WA Weed List
Hieracium caespitosum yellow hawkweed plant herbaceous not present high ID Weed List
Hieracium glomeratum queen devil hawkweed plant herbaceous not present low WA Weed List
Hieracium laevigatum smooth hawkweed plant herbaceous not present low WA Weed List
Hieracium pilosella mouseear hawkweed plant herbaceous not present moderate OR Weed List
Hieracium piloselloides king devil hawkweed plant herbaceous not present moderate MT Weed List
Hieracium x floribundum yellow devil hawkweed plant herbaceous not present moderate MT Weed List
Hirschfeldia incana shortpod mustard plant herbaceous widespread n/a (already in CA) Cal-IPC list
Holcus lanatus common velvet grass plant grass widespread n/a (already in CA) Cal-IPC list
Holotrichia mindanaona white grub arthropod beetle not present moderate USDA Plant/Pest
Homaledra sabalella palm leafskeletonizer arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Homalodisca vitripennis glassy-winged sharpshooter arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Homeria spp. cape tulip plant herbaceous not present low USDA Plant/Pest
Hordeum marinum Mediterranean barley plant grass widespread n/a (already in CA) Cal-IPC list
Hordeum murinum Mediterranean barley plant grass widespread n/a (already in CA) Cal-IPC list
Horidiplosis ficifolii Ornamental fig pest arthropod fly not present low Univ. Florida
Howardia biclavis mining scale arthropod scale, aphid not present high CDFA (reg. A)
Hydrilla verticillata hydrilla plant herbaceous limited n/a (already in CA) CDFA
Hydrocharis morsus-ranae European frog-bit plant herbaceous not present moderate WA Weed List
Hygrophila polysperma Miramar weed plant herbaceous not present high CDFA
Hylastinus obscurus clover root borer arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Hylobius pales pales weevil arthropod beetle not present high CDFA (reg. A)
Hylotrupes bajulus old house borer arthropod beetle not present high CDFA (reg. A)
Hylurgus ligniperda redhaired pine bark beetle arthropod beetle not present high CDFA (reg. B)
Hyoscyamus niger black henbane plant herbaceous limited n/a (already in CA) CDFA
Hypericum canariense Canary Island hypericum plant woody limited n/a (already in CA) CDFA
Hypericum perforatum common St. John's wort plant herbaceous widespread n/a (already in CA) CDFA
Hyperoides humilis weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Hypochaeris glabra smooth catsear plant herbaceous widespread n/a (already in CA) CO Weed List
Hypochaeris radicata rough catsear plant herbaceous widespread n/a (already in CA) Cal-IPC list
Hypophthalmichthys harmandi Largescale Carp vertebrate fish not present moderate Cal Code 14:671
Hypophthalmichthys molitrix Silver Carp vertebrate fish not present moderate Cal Code 14:671
Hypophthalmichthys nobilis Bighead Carp vertebrate fish not present high Lacey Act
Hypothenemus hampei coffee berry borer arthropod beetle not present moderate USDA Plant/Pest
Icerya aegyptiaca Egyptian fluted scale arthropod scale, aphid not present moderate USDA Plant/Pest
Ichthyophithirius multifilis Parsitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Icterus pectoralis Spot-breasted oriole vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Iguana iguana Green iguana vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Ilarvirus apmv Apple mosaic virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Ilex aquifolium English holly plant woody limited n/a (already in CA) Cal-IPC list
Ilynassa obsoleta Eastern mudsnail invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Impatiens glandulifera policeman's helmet plant herbaceous not present moderate OR Weed List
Imperata brasiliensis Brazilian satintail plant grass not present low USDA Plant/Pest
Imperata cylindrica cogongrass plant grass not present moderate USDA Plant/Pest
Influenzavirus hpav Highly Pathogenic Avian Influenza disease virus VALUE REQUIRED VALUE REQUIRED CDFA AHFSS
Inopus rubriceps Australian sod fly arthropod fly limited n/a (already in CA) CDFA (reg. B)
Ipomoea aquatica swamp morningglory plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Ipomoea triloba three-cornered morning glory plant herbaceous limited n/a (already in CA) AZ Weed List
Ipomovirus cbsv Cassava Brown Streak Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Isatis tinctoria dyer's woad plant herbaceous widespread n/a (already in CA) CDFA
Isavirus isa Infectious Salmon Isavirus Anemia (ISA) disease virus VALUE REQUIRED VALUE REQUIRED No list
Ischaemum rugosum murainograss plant grass not present low USDA Plant/Pest
Ischnaspis longirostris black thread scale arthropod scale, aphid not present high CDFA (reg. A)
Ischnoderma rosulata Wood decay disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Jasmine Variegation Agents Jasmine Variegation Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Junghuhnia vincta Corm dry rot disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Kickxia elatine sharpleaf cancerwort plant herbaceous widespread n/a (already in CA) Weeds of CA
Kilifia acuminata acuminate scale arthropod scale, aphid not present high CDFA (reg. A)
Kochia scoparia kochia plant herbaceous widespread n/a (already in CA) Cal-IPC list
Lacerta bilineata Western green lacerta vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Lachnellula willkommii Eurpoean larch canker disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Lactuca serriola prickly lettuce plant herbaceous widespread n/a (already in CA) Weeds of CA
Lagarosiphon major oxygenweed plant herbaceous not present moderate CDFA
Lagopus leucurus White-tailed ptarmigan vertebrate bird VALUE REQUIRED VALUE REQUIRED No list
Lamium amplexicaule henbit deadnettle plant herbaceous widespread n/a (already in CA) Weeds of CA
Lampides boeticus bean butterfly arthropod butterfly, moth not present moderate CDFA (reg. A)
Lampropholis delicate Plague skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Laspeyresia spp. Laspeyresia spp. arthropod butterfly, moth not present high USDA Plant/Pest
Leiocephalus carinatus Northern curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Leiocephalus schreibersii Red-sided curlytail lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Leiolepis belliana Butterfly lizard vertebrate reptile VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Leiothrix lutea Red-billed leiothrix vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Lepidium latifolium perennial pepperweed plant herbaceous widespread n/a (already in CA) CDFA
Lepidodactylus lugubris Mourning gecko vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al