Plants in horticulture
Interested in finding out which horticultural plants may cause problems in California’s natural areas? The table below shows all plants from the Cal-IPC Inventory that are known to occur in horticulture. Plants with an asterisk (*) after the scientific name are “Watch” plants, which are not currently invasive in California but which have been assessed as a high risk of becoming invasive in California in the future.
- Click the scientific name to see the Risk Assessment for any plant.
- For the Plant Profile page, with links to more information about that plant, click the icon in the right column.
- To sort the list (for instance, by rating), click on the appropriate column heading.
- To show only the plants found in a given PlantRight Region, use the Region filter [under construction].
| Scientific name | Common names | Rating | Alert | Profile |
|---|---|---|---|---|
| Acacia baileyana * | cootamundra wattle | Watch |  |
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| Acacia dealbata | silver wattle | Moderate | |
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| Acacia melanoxylon | blackwood acacia | Limited | |
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| Acaena novae-zelandiae * | biddy-biddy | Watch | |
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| Agrostis stolonifera | creeping bent | Limited | |
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| Ailanthus altissima | tree-of-heaven | Moderate | |
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| Alopecurus pratensis * | meadow foxtail | Watch | |
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| Araujia sericifera * | bladderflower | Watch | |
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| Arctotheca calendula | fertile capeweed | Moderate | X | |
| Arctotheca prostrata | capeweed | Moderate | |
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| Arundo donax | giant reed | High | |
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| Asparagus asparagoides | bridal creeper | Moderate | X | |
| Asphodelus fistulosus | onion weed | Moderate | X | |
| Atriplex semibaccata | Australian saltbush | Moderate | |
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| Berberis darwinii * | Darwin barberry | Watch | |
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| Briza maxima | big quakinggrass | Limited | |
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| Buddleja davidii * | butterfly bush | Watch | |
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| Carex pendula * | hanging sedge | Watch | |
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| Carpobrotus chilensis | sea fig | Moderate | |
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| Carpobrotus edulis | highway iceplant | High | |
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| Casuarina equisetifolia * | beach sheoak | Watch | |
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| Catharanthus roseus * | Madagascar periwinkle | Watch | |
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| Cestrum parqui * | willow jessamine | Watch | |
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| Chasmanthe floribunda * | African cornflag | Watch | |
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| Cordyline australis | New Zealand cabbage tree | Limited | |
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| Cortaderia jubata | jubatagrass | High | |
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| Cortaderia selloana | pampasgrass | High | |
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| Cotoneaster franchetii | orange cotoneaster | Moderate | |
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| Cotoneaster lacteus | milkflower cotoneaster | Moderate | |
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| Cotoneaster pannosus | silverleaf cotoneaster | Moderate | |
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| Cotula coronopifolia | common brassbuttons | Limited | |
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| Crataegus monogyna | English hawthorn | Limited | |
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| Crocosmia x crocosmiiflora | montbretia | Limited | |
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| Cynara cardunculus | artichoke thistle | Moderate | |
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| Cynodon dactylon | Bermuda grass | Moderate | |
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| Cynoglossum officinale | common houndstongue | Moderate | |
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| Cytisus scoparius | Scotch broom | High | |
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| Cytisus striatus | Portugese broom | Moderate | |
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| Dactylis glomerata | orchard grass | Limited | |
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| Datura inoxia * | pricklyburr | Watch | |
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| Delairea odorata | Cape-ivy | High | |
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| Digitalis purpurea | foxglove | Limited | |
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| Dipogon lignosus * | okie bean | Watch | |
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| Dipsacus fullonum | common teasel | Moderate | |
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| Echium candicans | pride-of-Madeira | Limited | |
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| Egeria densa | Brazilian egeria | High | |
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| Eichhornia crassipes | water hyacinth | High | |
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| Elaeagnus angustifolia | Russian olive | Moderate | |
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| Erica lusitanica | Spanish heath | Limited | |
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| Erodium cicutarium | redstem filaree | Limited | |
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| Eucalyptus camaldulensis | red gum | Limited | |
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| Eucalyptus cladocalyx * | sugargum | Watch | |
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| Eucalyptus globulus | blue gum | Limited | |
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| Euphorbia lathyris * | caper spurge | Watch | |
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| Euphorbia oblongata | eggleaf spurge | Limited | |
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| Fallopia ×bohemica * | Bohemian knotweed (X Japanese and Giant) | Watch | |
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| Festuca arundinacea | reed fescue | Moderate | |
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| Ficus carica | edible fig | Moderate | |
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| Foeniculum vulgare | fennel | Moderate | |
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| Gazania linearis | gazania | Moderate | X | |
| Genista monspessulana | French broom | High | |
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| Geranium lucidum * | shining geranium | Watch | |
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| Grevillea robusta * | silkoak | Watch | |
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| Gunnera tinctoria * | Chilean gunnera | Watch | |
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| Gypsophila paniculata * | baby's breath | Watch | |
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| Hedera canariensis | Algerian ivy | High | |
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| Hedera helix | English ivy | High | |
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| Helianthus tuberosus * | Jerusalem artichoke | Watch | |
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| Helichrysum petiolare | licorice plant | Limited | |
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| Hirschfeldia incana | short-pod mustard | Moderate | |
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| Holcus lanatus | common velvet grass | Moderate | |
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| Hypericum androsaemum * | sweet-amber | Watch | |
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| Hypericum canariense | Canary Island St. Johnswort | Moderate | X | |
| Hypericum perforatum | St. John's wort | Limited | |
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| Ilex aquifolium | English holly | Limited | |
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| Ipomoea indica * | blue morningglory | Watch | |
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| Iris pseudacorus | yellowflag iris | Limited | |
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| Isatis tinctoria | dyer's woad | Moderate | |
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| Kniphofia uvaria * | redhot poker | Watch | |
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| Kochia scoparia | kochia | Limited | |
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| Lantana camara * | lantana | Watch | |
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| Leptospermum laevigatum * | Australian tea tree | Watch | |
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| Leucanthemum vulgare | ox-eye daisy | Moderate | |
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| Linaria vulgaris | yellow toadflax | Moderate | |
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| Lobularia maritima | sweet alyssum | Limited | |
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| Ludwigia hexapetala | creeping waterprimrose | High | |
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| Ludwigia peploides | floating water primrose | High | |
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| Lythrum salicaria | purple loosestrife | High | |
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| Malephora crocea * | coppery mesembryanthemum | Watch | |
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| Marrubium vulgare | horehound | Limited | |
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| Maytenus boaria * | mayten | Watch | |
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| Mentha pulegium | pennyroyal | Moderate | |
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| Mesembryanthemum crystallinum | crystalline iceplant | Moderate | X | |
| Myoporum laetum | ngaio tree | Moderate | |
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| Myosotis latifolia | common forget-me-not | Limited | |
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| Myriophyllum aquaticum | parrotfeather | High | |
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| Nicotiana glauca | tree tobacco | Moderate | |
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| Olea europaea | olive | Limited | |
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| Onopordum acanthium | Scotch thistle | High | |
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| Paspalum vaginatum * | seashore paspalum | Watch | |
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| Peganum harmala * | African-rue | Watch | |
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| Pennisetum setaceum | crimson fountain grass | Moderate | |
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| Pennisetum villosum * | feathertop | Watch | |
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| Persicaria wallichii * | Himalayan knotweed | Watch | |
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| Phalaris aquatica | harding grass | Moderate | |
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| Phoenix canariensis | Canary Island date palm | Limited | |
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| Phytolacca americana | common pokeweed | Limited | |
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| Pittosporum undulatum * | Victorian box | Watch | |
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| Plantago lanceolata | English plantain | Limited | |
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| Plecostachys serpyllifolia * | petite-licorice | Watch | |
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| Poa pratensis | Kentucky bluegrass | Limited | |
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| Prunus cerasifera | cherry plum | Limited | |
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| Pyracantha angustifolia | narrowleaf firethorn | Limited | |
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| Pyrus calleryana * | Callery pear | Watch | |
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| Ranunculus repens | creeping buttercup | Limited | |
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| Rhamnus alaternus * | Italian buckthorn | Watch | |
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| Ricinus communis | castor bean | Limited | |
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| Robinia pseudoacacia | black locust | Limited | |
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| Rubus armeniacus | Himalayan blackberry | High | |
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| Rumex acetosella | sheep sorrel | Moderate | |
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| Saccharum ravennae | ravennagrass | Moderate | X | |
| Salvia aethiopis | Mediterranean sage | Limited | |
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| Saponaria officinalis | bouncing-bet | Limited | |
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| Scabiosa atropurpurea * | pincushion flower | Watch | |
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| Schinus molle | Peruvian pepper tree | Limited | |
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| Schinus terebinthifolius | Brazilian pepper tree | Moderate | X | |
| Sesbania punicea | scarlet wisteria | High | |
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| Silybum marianum | milk thistle | Limited | |
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| Solanum aviculare * | New Zealand nightshade | Watch | |
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| Spartium junceum | Spanish broom | High | |
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| Stipa tenuissima * | Mexican feathergrass | Watch | |
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| Tamarix aphylla | athel | Limited | |
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| Tamarix parviflora | smallflower tamarisk | High | |
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| Tamarix ramosissima | Saltcedar | High | |
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| Tanacetum vulgare | common tansy | Moderate | |
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| Triadica sebifera | Chinese tallow tree | Moderate | X | |
| Verbascum thapsus | woolly mullein | Limited | |
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| Verbena bonariensis * | tall vervain | Watch | |
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| Vinca major | periwinkle | Moderate | |
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| Washingtonia robusta | Mexican fan palm | Moderate | X | |
| Watsonia meriana | bulbil watsonia | Limited | |
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| Zantedeschia aethiopica | calla lily | Limited | |