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 |
|
|---|---|---|---|---|---|---|---|
| Sphaerophysa salsula | Austrian peaweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Striga asiatica | witchweed | plant | herbaceous | not present | moderate | CDFA | |
| Tagetes minuta | wild marigold | plant | herbaceous | not present | moderate | CDFA | |
| Aegilops triuncialis | barb goatgrass | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Arctotheca calendula (sterile) | sterile capeweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cabomba caroliniana | Carolina fanwort | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cardaria draba | hoary cress | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cardaria pubescens | hairy whitetop | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carduus pycnocephalus | Italian thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Carduus tenuiflorus | slenderflower thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Carthamus lanatus | woolly distaff thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cenchrus echinatus | southern sandbur | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Centaurea calcitrapa | purple starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Centaurea diffusa | diffuse knapweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Centaurea melitensis | Malta starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Centaurea solstitialis | yellow starthistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cirsium arvense | Canada thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Convolvulus arvensis | field bindweed | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cynara cardunculus | artichoke thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cynodon dactylon | bermudagrass | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Cyperus rotundus | purple nutsedge | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Cytisus scoparius | Scotch broom | plant | woody | widespread | n/a (already in CA) | CDFA | |
| Gaura sinuata | wavy-leaved gaura | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Genista monspessulana | French broom | plant | woody | widespread | n/a (already in CA) | CDFA | |
| Hypericum perforatum | common St. John's wort | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Isatis tinctoria | dyer's woad | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Lepidium latifolium | perennial pepperweed | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Lythrum salicaria | purple loosestrife | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Onopordum acanthium | Scotch thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Polygonum cuspidatum | Japanese knotweed | plant | woody | limited | n/a (already in CA) | CDFA | |
| Retama monosperma | bridal broom | plant | woody | limited | n/a (already in CA) | CDFA | |
| Rubus armeniacus | Himalaya blackberry | plant | woody | widespread | n/a (already in CA) | CDFA | |
| Salsola paulsenii | barbwire Russian-thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Salsola tragus | Russian-thistle | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Setaria faberi | giant foxtail | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Taeniatherum caput-medusae | medusahead | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Tribulus terrestris | puncturevine | plant | herbaceous | widespread | n/a (already in CA) | CDFA | |
| Ulex europaeus | gorse | plant | woody | limited | n/a (already in CA) | CDFA | |
| Cenchrus incertus | coast sandbur | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Elytrigia repens | quackgrass | plant | grass | widespread | n/a (already in CA) | CDFA | |
| Acacia paradoxa | kangaroothorn | plant | woody | limited | n/a (already in CA) | CDFA | |
| Acaena novae-zelandiae | biddy-biddy | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Acaena pallida | pale biddy-biddy | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Achnatherum brachychaetum | punagrass | plant | grass | limited | n/a (already in CA) | CDFA | |
| Aegilops ovata | ovate goatgrass | plant | grass | limited | n/a (already in CA) | CDFA | |
| Aeschynomene rudis | rough jointvetch | plant | woody | limited | n/a (already in CA) | CDFA | |
| Allium paniculatum | panicled onion | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Allium vineale | wild garlic | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Ambrosia trifida | giant ragweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Araujia sericifera | bladderflower | plant | woody | limited | n/a (already in CA) | CDFA | |
| Arctotheca calendula (fertile) | fertile capeweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cardaria chalepensis | lens-podded white-top | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carduus acanthoides | plumeless thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carduus nutans | musk thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carthamus baeticus | smooth distaff thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Centaurea iberica | Iberian starthistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Centaurea sulphurea | Sicilian thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Chondrilla juncea | rush skeletonweed | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Chorispora tenella | blue mustard | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cirsium japonicum | Japanese thistle | plant | herbaceous | not present | low | CDFA | |
| Cirsium ochrocentrum | yellowspine thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cirsium undulatum | wavyleaf thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Coronopus squamatus | swinecress | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Crupina vulgaris | common crupina | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cucumis melo var. duriam | dudaim melon | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cucumis myriocarpus | paddy melon | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cuscuta reflexa | giant dodder | plant | herbaceous | not present | low | CDFA | |
| Euphorbia esula | leafy spurge | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Euphorbia oblongata | oblong spurge | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Euphorbia terracina | carnation spurge | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Gaura drummondii | Drummond's gaura | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Gypsophila paniculata | baby's breath | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Halogeton glomeratus | halogeton | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Hydrilla verticillata | hydrilla | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| 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 | |
| Limnobium laevigatum | spongeplant | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Limnophila indica | ambulia | plant | herbaceous | not present | moderate | CDFA | |
| Linaria genistifolia ssp. dalmatica | Dalmatian toadflax | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Muhlenbergia schreberi | nimblewill | plant | grass | limited | n/a (already in CA) | CDFA | |
| Nothoscordum inodorum | false garlic | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| 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 | |
| Physalis viscosa | grape groundcherry | plant | herbaceous | 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 | |
| Potentilla recta | sulfur cinquefoil | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| 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 | |
| Salvia aethiopis | Mediterranean sage | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| 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 | |
| Symphytum asperum | rough comfrey | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Viscum album | European mistletoe | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Zostera japonica | Japanese eelgrass | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Carthamus leucocaulos | whitestem distaff thistle | plant | herbaceous | not present | moderate | CDFA |
