Scientific Name Common Namesort icon Type Subtype Extent Risk of Introduction First Source
Artemisia absinthium absinthe wormwood plant herbaceous limited n/a (already in CA) CO Weed List
Aeginetia spp. aeginetia plant herbaceous not present moderate USDA Plant/Pest
Lycium ferocissimum African boxthorn plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Pennisetum macrourum African feathergrass plant grass not present low USDA Plant/Pest
Alectra spp. alectra plant herbaceous not present moderate USDA Plant/Pest
Hedera canariensis Algerian ivy plant woody widespread n/a (already in CA) Cal-IPC list
Alternanthera philoxeroides alligator weed plant herbaceous limited n/a (already in CA) Cal-IPC list
Limnophila indica ambulia plant herbaceous not present moderate CDFA
Eichhornia azurea anchored water hyacinth plant herbaceous not present low USDA Plant/Pest
Avena sterilis animated oat plant grass limited n/a (already in CA) APHIS
Anchusa arvensis annual bugloss plant herbaceous limited n/a (already in CA) WA Weed List
Brachypodium distachyon annual false-brome plant grass widespread n/a (already in CA) Cal-IPC list
Sagittaria sagittifolia arrowhead plant herbaceous not present low USDA Plant/Pest
Monochoria hastata arrowleaf falsepickerelweed plant herbaceous not present low USDA Plant/Pest
Cynara cardunculus artichoke thistle plant herbaceous widespread n/a (already in CA) CDFA
Grateloupia turuturu Asian red seaweed plant algae VALUE REQUIRED VALUE REQUIRED Hoffman NOAA
Sargassum horneri Asian seaweed plant algae limited moderate Hoffman NOAA
Leptochloa chinensis Asian sprangletop plant grass not present moderate USDA Plant/Pest
Conyza bonariensis asthmaweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Tamarix aphylla athel tamarisk plant woody limited n/a (already in CA) Cal-IPC list
Cuscuta australis Australian dodder plant herbaceous not present low CDFA
Erechtites glomerata Australian fireweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Erechtites minima Australian fireweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Atriplex semibaccata Australian saltbush plant herbaceous widespread n/a (already in CA) Cal-IPC list
Crassula helmsii Australian swamp stonecrop plant herbaceous not present low WA Weed List
Rorippa austriaca Austrian field cress plant herbaceous limited n/a (already in CA) CDFA
Sphaerophysa salsula Austrian peaweed plant herbaceous limited n/a (already in CA) CDFA
Gypsophila paniculata baby's breath plant herbaceous limited n/a (already in CA) CDFA
Nymphaea mexicana banana waterlily plant herbaceous limited n/a (already in CA) CDFA
Aegilops triuncialis barb goatgrass plant grass widespread n/a (already in CA) CDFA
Salsola paulsenii barbwire Russian-thistle plant herbaceous widespread n/a (already in CA) CDFA
Bellardia trixago bellardia plant herbaceous limited n/a (already in CA) Cal-IPC list
Commelina benghalensis Benghal dayflower plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Oxalis pes-caprae Bermuda buttercup plant herbaceous widespread n/a (already in CA) Cal-IPC list
Cynodon dactylon bermudagrass plant grass widespread n/a (already in CA) CDFA
Acaena novae-zelandiae biddy-biddy plant herbaceous limited n/a (already in CA) CDFA
Vinca major big periwinkle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Briza maxima big quackingrass plant grass widespread n/a (already in CA) Cal-IPC list
Centaurea macrocephala bighead knapweed plant herbaceous not present moderate WA Weed List
Brassica rapa birdsrape mustard plant herbaceous widespread n/a (already in CA) Cal-IPC list
Mikania micrantha bittervine plant herbaceous not present low USDA Plant/Pest
Acacia melanoxylon black acacia plant woody limited n/a (already in CA) Cal-IPC list
Hyoscyamus niger black henbane plant herbaceous limited n/a (already in CA) CDFA
Centaurea nigra black knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Robinia pseudoacacia black locust plant woody limited n/a (already in CA) Cal-IPC list
Brassica nigra black mustard plant herbaceous widespread n/a (already in CA) Cal-IPC list
Solanum nigrum black nightshade plant herbaceous widespread n/a (already in CA) Weeds of CA
Alopecurus myosuroides blackgrass plant grass limited n/a (already in CA) WA Weed List
Silene latifolia ssp. alba bladder campion plant herbaceous limited n/a (already in CA) WA Weed List
Araujia sericifera bladderflower plant woody limited n/a (already in CA) CDFA
Silybum marianum blessed milkthistle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Chorispora tenella blue mustard plant herbaceous limited n/a (already in CA) CDFA
Panicum antidotale blue panicgrass plant grass limited n/a (already in CA) CDFA
Helianthus ciliaris blueweed plant herbaceous limited n/a (already in CA) CDFA
Limnophila sessiliflora blume (ambulia) plant herbaceous not present moderate CDFA
Polygonum x bohemicum Bohemian knotweed plant herbaceous not present moderate WA Weed List
Saponaria officinalis bouncingbet plant herbaceous limited n/a (already in CA) Cal-IPC list
Orobanche ramosa branched broomrape plant herbaceous limited n/a (already in CA) CDFA
Cotula coronopifolia brassbuttons plant herbaceous widespread n/a (already in CA) Cal-IPC list
Egeria densa Brazilian egeria plant herbaceous widespread n/a (already in CA) Cal-IPC list
Schinus terebinthifolius Brazilian peppertree plant woody limited n/a (already in CA) Cal-IPC list
Imperata brasiliensis Brazilian satintail plant grass not present low USDA Plant/Pest
Retama monosperma bridal broom plant woody limited n/a (already in CA) CDFA
Asparagus asparagoides bridal creeper plant herbaceous limited n/a (already in CA) Cal-IPC list
Picris echioides bristly oxtongue plant herbaceous widespread n/a (already in CA) Cal-IPC list
Erodium botrys broadleaf filaree plant herbaceous widespread n/a (already in CA) Weeds of CA
Melaleuca quinquenervia broadleaf paper bard tree plant woody not present low USDA Plant/Pest
Orobanche spp. broomrape plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Centaurea jacea brown knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Plantago lanceolata buckhorn plantain plant herbaceous widespread n/a (already in CA) Cal-IPC list
Solanum rostratum buffalobur plant herbaceous limited n/a (already in CA) ID Weed List
Pennisetum ciliare buffelgrass plant grass limited n/a (already in CA) AZ Weed List
Watsonia meriana bulbil watsonia plant herbaceous limited n/a (already in CA) Cal-IPC list
Malva niaceensis bull mallow plant herbaceous widespread n/a (already in CA) Weeds of CA
Cirsium vulgare bull thistle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Buddleja davidii butterflybush plant woody limited n/a (already in CA) OR Weed List
Medicago polymorpha California burclover plant herbaceous widespread n/a (already in CA) Cal-IPC list
Zantedeschia aethiopica calla lily plant herbaceous limited n/a (already in CA) Cal-IPC list
Alhagi maurorum camelthorn plant woody limited n/a (already in CA) NV Weed List
Cirsium arvense Canada thistle plant herbaceous widespread n/a (already in CA) CDFA
Phoenix canariensis Canary Island date palm plant woody limited n/a (already in CA) No list
Hypericum canariense Canary Island hypericum plant woody limited n/a (already in CA) CDFA
Homeria spp. cape tulip plant herbaceous not present low USDA Plant/Pest
Delairea odorata Cape-ivy plant herbaceous widespread n/a (already in CA) Cal-IPC list
Euphorbia terracina carnation spurge plant herbaceous limited n/a (already in CA) CDFA
Cabomba caroliniana Carolina fanwort plant herbaceous limited n/a (already in CA) CDFA
Solanum carolinense Carolina horsenettle plant herbaceous limited n/a (already in CA) CDFA
Ricinus communis castorbean plant herbaceous widespread n/a (already in CA) Cal-IPC list
Mimosa pigra catclaw mimosa plant woody not present low USDA Plant/Pest
Setaria pumila ssp. pallidefusca cattail grass plant grass not present moderate USDA Plant/Pest
Caulerpa brachypus Caulerpa brachypus plant algae unknown high Hoffman NOAA
Caulerpa racemosa Caulerpa racemosa plant algae VALUE REQUIRED high Hoffman NOAA
Secale cereale cereal rye plant grass widespread n/a (already in CA) WA Weed List
Malva parviflora cheeseweed mallow plant herbaceous widespread n/a (already in CA) Weeds of CA
Prunus cerasifera cherry plum plant woody widespread n/a (already in CA) Cal-IPC list
Cichorium intybus chicory plant herbaceous widespread n/a (already in CA) CO Weed List
Clematis orientalis Chinese clematis plant herbaceous not present high CO Weed List
Sapium sebiferum Chinese tallowtree plant woody limited n/a (already in CA) Cal-IPC list
Salvia sclarea clary sage plant herbaceous not present moderate WA Weed List
Cenchrus incertus coast sandbur plant grass widespread n/a (already in CA) CDFA