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 Name |
Type |
Subtype | Extent | Risk of Introduction | First Source | |
|---|---|---|---|---|---|---|---|
| Stipa capensis | Mediterranean steppegrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Symphytum asperum | rough comfrey | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Ulmus pumila | Siberian elm | plant | woody | limited | n/a (already in CA) | Med. plants list | |
| Verbena litoralis | tall vervain | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Viscum album | European mistletoe | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Watsonia meriana | bulbil watsonia | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Zostera japonica | Japanese eelgrass | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Avena sterilis | animated oat | plant | grass | limited | n/a (already in CA) | APHIS | |
| Carthamus leucocaulos | whitestem distaff thistle | plant | herbaceous | not present | moderate | CDFA | |
| Cenchrus longispinus | mat sandbur | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Echium vulgare | common viper's bugloss | plant | herbaceous | not present | high | WA Weed List | |
| Emex australis | three-cornered jack | plant | herbaceous | limited | n/a (already in CA) | USDA Plant/Pest | |
| Euphorbia dentata | toothed spurge | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Hesperis matronalis | dame's rocket | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Mirabilis nyctaginea | wild four o-clock | plant | herbaceous | limited | n/a (already in CA) | WA Weed List | |
| Nymphaea mexicana | banana waterlily | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Onopordum illyricum | Illyrian thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Onopordum tauricum | Taurian thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Ottelia alismoides | ducklettuce | plant | herbaceous | not present | high | USDA Plant/Pest | |
| Physalis longifolia | long-leaf groundcherry | plant | herbaceous | not present | moderate | CDFA | |
| Tamarix chinensis | salt cedar | plant | woody | limited | n/a (already in CA) | CO Weed List | |
| Cuscuta japonica | Japanese dodder | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Amorpha fruticosa | indigobush | plant | woody | limited | n/a (already in CA) | WA Weed List | |
| Ascophyllum nodosum | common brown algae | plant | algae | limited | n/a (already in CA) | Hoffman NOAA | |
| Brachypodium sylvaticum | perennial false-brome | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Centaurea jacea | brown knapweed | plant | herbaceous | limited | n/a (already in CA) | WA Weed List | |
| Centaurea stoebe ssp. micranthos | spotted knapweed | plant | herbaceous | limited | n/a (already in CA) | AZ Weed List | |
| Cladophora spp. | green algae | plant | algae | limited | VALUE REQUIRED | Hoffman NOAA | |
| Clematis vitalba | old man's beard | plant | herbaceous | limited | n/a (already in CA) | OR Weed List | |
| Drymaria arenarioides | lightening weed | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Ludwigia grandiflora | large flower primrose willow | plant | herbaceous | limited | n/a (already in CA) | WA Weed List | |
| Lysimachia vulgaris | garden loosestrife | plant | herbaceous | not present | high | WA Weed List | |
| Pennisetum ciliare | buffelgrass | plant | grass | limited | n/a (already in CA) | AZ Weed List | |
| Pennisetum villosum | feathergrass | plant | grass | limited | n/a (already in CA) | No list | |
| Phalaris arundinacea | reed canarygrass | plant | grass | limited | n/a (already in CA) | WA Weed List | |
| Poa pratensis | Kentucky bluegrass | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Pyracantha coccinea | pyracantha | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Pyracantha crenulata | pyracantha | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Silene latifolia ssp. alba | bladder campion | plant | herbaceous | limited | n/a (already in CA) | WA Weed List | |
| Aeginetia spp. | aeginetia | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Alectra spp. | alectra | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Allaria petiolata | garlic mustard | plant | herbaceous | not present | high | OR Weed List | |
| Alternanthera sessilis | sessile joyweed | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Ambrosia tomentosa | skeletonleaf bursage | plant | herbaceous | not present | high | ID Weed List | |
| Anthriscus sylvestris | wild chervil | plant | herbaceous | not present | high | WA Weed List | |
| Artemisia absinthium | absinthe wormwood | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Azolla pinnata | mosquito fern | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Bryonia alba | white bryony | plant | herbaceous | not present | moderate | WA Weed List | |
| Butomus umbellatus | flowering rush | plant | herbaceous | not present | high | WA Weed List | |
| Carthamus oxyacantha | wild safflower | plant | herbaceous | limited | n/a (already in CA) | USDA Plant/Pest | |
| Carum carvi | wild caraway | plant | herbaceous | not present | high | CO Weed List | |
| Caulacanthus ustulatus | red algae | plant | algae | unknown | VALUE REQUIRED | Hoffman NOAA | |
| Centaurea macrocephala | bighead knapweed | plant | herbaceous | not present | moderate | WA Weed List | |
| Chaenorhinum minus | dwarf snapdragon | plant | herbaceous | not present | moderate | WA Weed List | |
| Chrysopogon aciculatus | pilipiliula | plant | grass | not present | low | USDA Plant/Pest | |
| Clematis orientalis | Chinese clematis | plant | herbaceous | not present | high | CO Weed List | |
| Crassula helmsii | Australian swamp stonecrop | plant | herbaceous | not present | low | WA Weed List | |
| Didymosphenia geminata | didymo | plant | algae | limited | high | Hoffman NOAA | |
| Digitaria velutina | velvet fingergrass | plant | grass | not present | moderate | USDA Plant/Pest | |
| Dipsacus laciniatus | cutleaf teasel | plant | herbaceous | not present | high | CO Weed List | |
| Eichhornia azurea | anchored water hyacinth | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Epilobium hirsutum | hairy willow herb | plant | herbaceous | not present | high | WA Weed List | |
| Euphorbia cyparissias | cypress spurge | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Euphorbia myrsinites | myrtle spurge | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Euryops multifidus | hawk's eye | plant | woody | not present | high | AZ Weed List | |
| Fatoua villosa | hairy crabwees | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Galega officinalis | goatsrue | plant | herbaceous | not present | moderate | USDA Plant/Pest | |
| Glossostigma diandrum | mud mat | plant | herbaceous | not present | low | WA Weed List | |
| Grateloupia turuturu | Asian red seaweed | plant | algae | VALUE REQUIRED | VALUE REQUIRED | Hoffman NOAA | |
| Hedera hibernica | English ivy | plant | woody | not present | high | WA Weed List | |
| Heracleum mantegazzianum | giant hogweed | plant | herbaceous | not present | high | CDFA | |
| Hieracium atratum | polar hawkweed | plant | herbaceous | not present | low | 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 | |
| Homeria spp. | cape tulip | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Hydrocharis morsus-ranae | European frog-bit | plant | herbaceous | not present | moderate | WA Weed List | |
| Hygrophila polysperma | Miramar weed | plant | herbaceous | not present | high | CDFA | |
| 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 | |
| Ipomoea aquatica | swamp morningglory | plant | herbaceous | limited | n/a (already in CA) | USDA Plant/Pest | |
| Ischaemum rugosum | murainograss | plant | grass | not present | low | USDA Plant/Pest | |
| Lagarosiphon major | oxygenweed | plant | herbaceous | not present | moderate | CDFA | |
| Leptochloa chinensis | Asian sprangletop | plant | grass | not present | moderate | USDA Plant/Pest | |
| Lepyrodiclis holosteoides | false jagged-chickweed | plant | herbaceous | not present | low | WA Weed List | |
| Lespedeza cuneata | sericea lespedeza | plant | herbaceous | not present | moderate | CO Weed List | |
| Limnophila sessiliflora | blume (ambulia) | plant | herbaceous | not present | moderate | CDFA | |
| Lomentaria hakodatensis | yendo | plant | algae | VALUE REQUIRED | VALUE REQUIRED | Hoffman NOAA | |
| Ludwigia peruviana | water primrose | plant | herbaceous | not present | moderate | CDFA | |
| Lycium ferocissimum | African boxthorn | plant | herbaceous | limited | n/a (already in CA) | USDA Plant/Pest | |
| Lythrum virgatum | purple loosestrife | plant | herbaceous | not present | low | MT Weed List | |
| Melaleuca quinquenervia | broadleaf paper bard tree | plant | woody | not present | low | USDA Plant/Pest | |
| Melastoma malabathricum | Malabar melastome | plant | woody | not present | low | APHIS | |
| Mikania cordata | mile-a-minute | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Mikania micrantha | bittervine | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Milium vernale | milium | plant | grass | not present | low | ID Weed List |
