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 | |
|---|---|---|---|---|---|---|---|
| Nymphaea odorata | fragrant waterlily | plant | herbaceous | limited | n/a (already in CA) | WA Weed List | |
| Nymphoides peltata | yellow floating heart | plant | herbaceous | limited | n/a (already in CA) | OR Weed List | |
| Ononis alopecuroides | foxtail restharrow | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Orobanche cooperi | Cooper's broomrape | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Orobanche ramosa | branched broomrape | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Panicum antidotale | blue panicgrass | plant | grass | limited | n/a (already in CA) | CDFA | |
| Peganum harmala | harmel | plant | herbaceous | not present | high | No list | |
| Physalis viscosa | grape groundcherry | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Pittosporum undulatum | Victorian box | plant | woody | limited | n/a (already in CA) | Med. plants list | |
| 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 | |
| Potentilla recta | sulfur cinquefoil | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Prosopis strombulifera | creeping mesquite | plant | woody | not present | moderate | USDA Plant/Pest | |
| Ranunculus acris | tall buttercup | plant | herbaceous | limited | n/a (already in CA) | MT Weed List | |
| Rorippa austriaca | Austrian field cress | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Rorippa sylvestris | creeping yellow field cress | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Saccharum ravennae | ravennagrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Salvia aethiopis | Mediterranean sage | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Salvinia auriculata | giant salvinia | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Salvinia molesta | giant salvinia | plant | herbaceous | limited | n/a (already in CA) | Cal-IPC list | |
| Sapium sebiferum | Chinese tallowtree | plant | woody | limited | n/a (already in CA) | Cal-IPC list | |
| Sargassum horneri | Asian seaweed | plant | algae | limited | moderate | Hoffman NOAA | |
| Secale cereale | cereal rye | plant | grass | widespread | n/a (already in CA) | WA Weed List | |
| Senecio jacobaea | tansy ragwort | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Solanum carolinense | Carolina horsenettle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Solanum elaeagnifolium | silverleaf nightshade | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Solanum lanceolatum | lanceleaf nightshade | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Spartina anglica | common cordgrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Spartina patens | saltmeadow cord grass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| 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 |
