Scientific Namesort icon Common Name Type Subtype Extent Risk of Introduction First Source
Centaurea iberica Iberian starthistle plant herbaceous limited n/a (already in CA) CDFA
Centaurea jacea brown knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Centaurea macrocephala bighead knapweed plant herbaceous not present moderate WA Weed List
Centaurea melitensis Malta starthistle plant herbaceous widespread n/a (already in CA) CDFA
Centaurea nigra black knapweed plant herbaceous limited n/a (already in CA) WA Weed List
Centaurea solstitialis yellow starthistle plant herbaceous widespread n/a (already in CA) CDFA
Centaurea stoebe ssp. micranthos spotted knapweed plant herbaceous limited n/a (already in CA) AZ Weed List
Centaurea sulphurea Sicilian thistle plant herbaceous limited n/a (already in CA) CDFA
Centaurea virgata ssp. Squarrosa squarrose knapweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Chaenorhinum minus dwarf snapdragon plant herbaceous not present moderate WA Weed List
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
Chrysanthemum coronarium crown daisy plant herbaceous limited n/a (already in CA) Cal-IPC list
Chrysopogon aciculatus pilipiliula plant grass not present low USDA Plant/Pest
Cichorium intybus chicory plant herbaceous widespread n/a (already in CA) CO Weed List
Cirsium arvense Canada thistle plant herbaceous widespread 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
Cirsium vulgare bull thistle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Cladophora spp. green algae plant algae limited VALUE REQUIRED Hoffman NOAA
Clematis orientalis Chinese clematis plant herbaceous not present high CO Weed List
Clematis vitalba old man's beard plant herbaceous limited n/a (already in CA) OR Weed List
Commelina benghalensis Benghal dayflower plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Conicosia pugioniformis narrowleaf iceplant plant herbaceous limited n/a (already in CA) Cal-IPC list
Conium maculatum poison-hemlock plant herbaceous widespread n/a (already in CA) Cal-IPC list
Convolvulus arvensis field bindweed plant herbaceous widespread n/a (already in CA) CDFA
Conyza bonariensis asthmaweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Cordyline australis giant dracaena plant herbaceous limited n/a (already in CA) Cal-IPC list
Coronopus squamatus swinecress plant herbaceous limited n/a (already in CA) CDFA
Cortaderia jubata jubatagrass plant grass widespread n/a (already in CA) Cal-IPC list
Cortaderia selloana pampasgrass plant grass widespread n/a (already in CA) Cal-IPC list
Cotoneaster franchetii orange cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster lacteus Parney's cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotoneaster pannosus silverleaf cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Cotula coronopifolia brassbuttons plant herbaceous widespread n/a (already in CA) Cal-IPC list
Crassula helmsii Australian swamp stonecrop plant herbaceous not present low WA Weed List
Crataegus monogyna hawthorn plant woody limited n/a (already in CA) Cal-IPC list
Crocosmia x crocosmiiflora montbretia plant herbaceous limited n/a (already in CA) Cal-IPC list
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 approximata smoothseed alfalfa dodder plant herbaceous limited n/a (already in CA) WA Weed List
Cuscuta australis Australian dodder plant herbaceous not present low CDFA
Cuscuta japonica Japanese dodder plant herbaceous limited n/a (already in CA) CDFA
Cuscuta monogyna Eastern Dodder plant herbaceous not present low No list
Cuscuta reflexa giant dodder plant herbaceous not present low CDFA
Cuscuta spp. (C. japonica, reflexa, australia, monogyna) Dodder (non-native spp.) plant herbaceous limited 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
Cynoglossum officinale houndstongue plant herbaceous limited n/a (already in CA) Cal-IPC list
Cynosurus echinatus hedgehog dogtailgrass plant grass widespread n/a (already in CA) Cal-IPC list
Cyperus difformis variable flatsedge plant herbaceous limited n/a (already in CA) Weeds of CA
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
Cytisus striatus Portuguese broom plant woody limited n/a (already in CA) Cal-IPC list
Dactylis glomerata orchardgrass plant grass widespread n/a (already in CA) Cal-IPC list
Daucus carota wild carrot plant herbaceous widespread n/a (already in CA) WA Weed List
Delairea odorata Cape-ivy plant herbaceous widespread n/a (already in CA) Cal-IPC list
Descurainia sophia flixweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Didymosphenia geminata didymo plant algae limited high Hoffman NOAA
Digitalis purpurea foxglove plant herbaceous limited n/a (already in CA) Cal-IPC list
Digitaria abyssinica Digitaria abyssinica plant grass not present moderate OR Weed List
Digitaria sanguinalis hairy crabgrass plant grass widespread n/a (already in CA) Weeds of CA
Digitaria velutina velvet fingergrass plant grass not present moderate USDA Plant/Pest
Dipsacus fullonum common teasel plant herbaceous widespread n/a (already in CA) Cal-IPC list
Dipsacus laciniatus cutleaf teasel plant herbaceous not present high CO Weed List
Dipsacus sativus fuller's teasel plant herbaceous widespread n/a (already in CA) Cal-IPC list
Dittrichia graveolens stinkwort plant herbaceous widespread n/a (already in CA) Cal-IPC list
Drymaria arenarioides lightening weed plant herbaceous not present moderate USDA Plant/Pest
Echinochloa colona jungle rice plant grass widespread n/a (already in CA) Weeds of CA
Echinochloa oryzicola early watergrass plant grass limited n/a (already in CA) Weeds of CA
Echinochloa phyllopogon rice barnyardgrass plant grass limited n/a (already in CA) Weeds of CA
Echium candicans pride-of-Madeira plant herbaceous limited n/a (already in CA) Cal-IPC list
Echium plantagineum Paterson's curse plant herbaceous limited n/a (already in CA) OR Weed List
Echium vulgare common viper's bugloss plant herbaceous not present high WA Weed List
Egeria densa Brazilian egeria plant herbaceous widespread n/a (already in CA) Cal-IPC list
Ehrharta calycina purple veldtgrass plant grass widespread n/a (already in CA) Cal-IPC list
Ehrharta erecta erect veldtgrass plant grass limited n/a (already in CA) Cal-IPC list
Ehrharta longiflora long-flowered veldtgrass plant grass limited n/a (already in CA) Cal-IPC list
Eichhornia azurea anchored water hyacinth plant herbaceous not present low USDA Plant/Pest
Eichhornia crassipes water hyacinth plant herbaceous widespread n/a (already in CA) Cal-IPC list
Elaeagnus angustifolia Russian-olive plant woody limited n/a (already in CA) Cal-IPC list
Elytrigia repens quackgrass plant grass widespread n/a (already in CA) CDFA
Emex australis three-cornered jack plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Emex spinosa devil's-thorn plant herbaceous limited n/a (already in CA) Cal-IPC list
Epilobium hirsutum hairy willow herb plant herbaceous not present high WA Weed List
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
Erigeron karvinskianus Mexican daisy plant herbaceous limited n/a (already in CA) Med. plants list
Erodium botrys broadleaf filaree plant herbaceous widespread n/a (already in CA) Weeds of CA
Erodium cicutarium redstem filaree plant herbaceous widespread n/a (already in CA) Cal-IPC list
Erodium moschatum whitestem filaree plant herbaceous widespread n/a (already in CA) Weeds of CA
Eucalyptus camaldulensis red gum plant woody limited n/a (already in CA) Cal-IPC list
Eucalyptus globulus Tasmanian blue gum plant woody widespread n/a (already in CA) Cal-IPC list
Euphorbia cyparissias cypress spurge plant herbaceous limited n/a (already in CA) CO Weed List
Euphorbia dentata toothed spurge plant herbaceous limited n/a (already in CA) CO Weed List
Euphorbia esula leafy spurge plant herbaceous limited n/a (already in CA) CDFA
Euphorbia myrsinites myrtle spurge plant herbaceous limited n/a (already in CA) CO Weed List
Euphorbia oblongata oblong spurge plant herbaceous limited n/a (already in CA) CDFA