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 |  | |
| Acacia dealbata | silver wattle | Moderate | | |
| Acacia longifolia * | Sydney golden wattle | Watch | | |
| Acacia melanoxylon | blackwood Acacia | Limited | | |
| Acacia saligna * | orange wattle | Watch | | |
| Acaena novae-zelandiae * | biddy-biddy | Watch | | |
| Agrostis stolonifera | creeping bent | Limited | | |
| Ailanthus altissima | tree-of-heaven | Moderate | | |
| Alopecurus pratensis * | meadow foxtail | Watch | | |
| Araujia sericifera * | bladderflower | Watch | | |
| Arctotheca calendula | fertile capeweed | Moderate | X | |
| Arctotheca prostrata | capeweed | Moderate | | |
| Arum italicum * | Italian Arum | Watch | | |
| Arundo donax | giant reed | High | | |
| Asparagus setaceus * | common Asparagus fern | Watch | | |
| Asparagus aethiopicus * | Asparagus fern | Watch | | |
| Asparagus asparagoides | bridal creeper | Moderate | X | |
| Asphodelus fistulosus | onion weed | Moderate | X | |
| Atriplex semibaccata | Australian saltbush | Moderate | | |
| Berberis darwinii * | Darwin barberry | Watch | | |
| Briza maxima | big quakinggrass | Limited | | |
| Buddleja davidii * | butterfly bush | Watch | | |
| Carex pendula * | hanging sedge | Watch | | |
| Carpobrotus chilensis | sea fig | Moderate | | |
| Carpobrotus edulis | highway iceplant | High | | |
| Casuarina equisetifolia * | beach sheoak | Watch | | |
| Catharanthus roseus * | Madagascar periwinkle | Watch | | |
| Cestrum parqui * | willow jessamine | Watch | | |
| Chasmanthe floribunda * | African cornflag | Watch | | |
| Cortaderia jubata | jubatagrass | High | | |
| Cortaderia selloana | pampasgrass | High | | |
| Cotoneaster franchetii | orange Cotoneaster | Moderate | | |
| Cotoneaster lacteus | milkflower Cotoneaster | Moderate | | |
| Cotoneaster pannosus | silverleaf Cotoneaster | Moderate | | |
| Cotula coronopifolia | common brassbuttons | Limited | | |
| Crataegus monogyna | English hawthorn | Limited | | |
| Crocosmia x crocosmiiflora | montbretia | Limited | | |
| Cuscuta japonica * | Japanese dodder | Watch | | |
| Cynara cardunculus | artichoke thistle | Moderate | | |
| Cynodon dactylon | Bermuda grass | Moderate | | |
| Cynoglossum officinale | common houndstongue | Moderate | | |
| Cytisus scoparius | Scotch broom | High | | |
| Cytisus striatus | Portuguese broom | Moderate | | |
| Dactylis glomerata | orchard grass | Limited | | |
| Datura inoxia * | pricklyburr | Watch | | |
| Delairea odorata | Cape-ivy | High | | |
| Digitalis purpurea | foxglove | Limited | | |
| Dipogon lignosus * | Cape sweet pea | Watch | | |
| Dipsacus fullonum | wild teasel | Moderate | | |
| Echium candicans | pride-of-Madeira | Limited | | |
| Egeria densa | Brazilian Egeria | High | | |
| Eichhornia crassipes | water hyacinth | High | | |
| Elaeagnus angustifolia | Russian olive | Moderate | | |
| Erica lusitanica | Spanish heath | Limited | | |
| Erodium cicutarium | redstem filaree | Limited | | |
| Eucalyptus camaldulensis | red gum | Limited | | |
| Eucalyptus cladocalyx * | sugargum | Watch | | |
| Eucalyptus globulus | blue gum | Limited | | |
| Euphorbia lathyris * | caper spurge | Watch | | |
| Euphorbia myrsinites * | myrtle spurge | Watch | | |
| Euphorbia oblongata | eggleaf spurge | Limited | | |
| Fallopia ×bohemica * | Bohemian knotweed | Watch | | |
| Festuca arundinacea | reed fescue | Moderate | | |
| Ficus carica | edible fig | Moderate | | |
| Foeniculum vulgare | fennel | Moderate | | |
| Galenia pubescens * | coastal Galenia | Watch | | |
| Gazania linearis | Gazania | Moderate | X | |
| Genista monspessulana | French broom | High | | |
| Geranium lucidum * | shining Geranium | Watch | | |
| Grevillea robusta * | silkoak | Watch | | |
| Gunnera tinctoria * | Chilean Gunnera | Watch | | |
| Gypsophila paniculata * | baby's breath | Watch | | |
| Hedera canariensis | Algerian ivy | High | | |
| Hedera helix | English ivy | High | | |
| Helianthus tuberosus * | Jerusalem artichoke | Watch | | |
| Helichrysum petiolare | licorice plant | Limited | | |
| Hieracium aurantiacum * | orange hawkweed | Watch | | |
| Hirschfeldia incana | short-pod mustard | Moderate | | |
| Holcus lanatus | common velvet grass | Moderate | | |
| Hypericum androsaemum * | sweet-amber | Watch | | |
| Hypericum canariense | Canary Island St. Johnswort | Moderate | X | |
| Hypericum perforatum | St. John's wort | Limited | | |
| Ilex aquifolium | English holly | Limited | | |
| Impatiens glandulifera * | Himalayan balsam | Watch | | |
| Ipomoea indica * | blue morning glory | Watch | | |
| Iris pseudacorus | yellowflag Iris | Limited | | |
| Isatis tinctoria | dyer's woad | Moderate | | |
| Kniphofia uvaria * | redhot poker | Watch | | |
| Kochia scoparia | Kochia | Limited | | |
| Lantana camara * | Lantana | Watch | | |
| Lathyrus latifolius * | perennial sweet pea | Watch | | |
| Leptospermum laevigatum * | Australian tea tree | Watch | | |
| Leucanthemum vulgare | ox-eye daisy | Moderate | | |
| Linaria vulgaris | yellow toadflax | Moderate | | |
| Lobularia maritima | sweet Alyssum | Limited | | |
| Ludwigia hexapetala | creeping waterprimrose | High | | |
| Ludwigia peploides | floating water primrose | High | | |
| Lythrum junceum * | creeping loosestrife | Watch | | |
| Lythrum salicaria | purple loosestrife | High | | |
| Malephora crocea * | coppery Mesembryanthemum | Watch | | |
| Marrubium vulgare | horehound | Limited | | |
| Maytenus boaria * | mayten | Watch | | |
| Melia azedarach * | Chinaberry tree | Watch | | |
| Melinis repens * | Natal grass | Watch | | |
| Mentha pulegium | pennyroyal | Moderate | | |
| Mesembryanthemum crystallinum | crystalline iceplant | Moderate | X | |
| Myoporum laetum | ngaio tree | Moderate | | |
| Myosotis latifolia | common forget-me-not | Limited | | |
| Myriophyllum aquaticum | parrotfeather | High | | |
| Nassella trichotoma * | serrated tussock | Watch | | |
| Nicotiana glauca | tree tobacco | Moderate | | |
| Olea europaea | olive | Limited | | |
| Onopordum acanthium | Scotch thistle | High | | |
| Osteospermum calendulaceum * | stinking Roger | Watch | | |
| Paspalum vaginatum * | seashore Paspalum | Watch | | |
| Peganum harmala * | African-rue | Watch | | |
| Pennisetum ciliare * | buffelgrass | Watch | | |
| Pennisetum setaceum | crimson fountain grass | Moderate | | |
| Pennisetum villosum * | feathertop | Watch | | |
| Persicaria wallichii * | Himalayan knotweed | Watch | | |
| Phalaris aquatica | harding grass | Moderate | | |
| Phoenix canariensis | Canary Island date palm | Limited | | |
| Phytolacca americana | common pokeweed | Limited | | |
| Pittosporum undulatum * | Victorian box | Watch | | |
| Plantago lanceolata | English plantain | Limited | | |
| Plecostachys serpyllifolia * | petite-licorice | Watch | | |
| Poa pratensis | Kentucky bluegrass | Limited | | |
| Potentilla recta * | sulphur cinquefoil | Watch | | |
| Prunus cerasifera | cherry plum | Limited | | |
| Pulicaria paludosa * | Spanish false fleabane | Watch | | |
| Pyracantha angustifolia | narrowleaf firethorn | Limited | | |
| Pyrus calleryana * | Callery pear | Watch | | |
| Ranunculus repens | creeping buttercup | Limited | | |
| Rhamnus alaternus * | Italian buckthorn | Watch | | |
| Ricinus communis | castor bean | Limited | | |
| Robinia pseudoacacia | black locust | Limited | | |
| Rubus armeniacus | Himalayan blackberry | High | | |
| Saccharum ravennae | ravennagrass | Moderate | X | |
| Salvia aethiopis | Mediterranean sage | Limited | | |
| Saponaria officinalis | bouncing-bet | Limited | | |
| Scabiosa atropurpurea * | pincushion flower | Watch | | |
| Schinus molle | Peruvian peppertree | Limited | | |
| Schinus terebinthifolia | Brazilian pepper tree | Moderate | X | |
| Senecio angulatus * | creeping groundsel | Watch | | |
| Senecio elegans * | redpurple ragwort | Watch | | |
| Sesbania punicea | scarlet Wisteria | High | | |
| Silybum marianum | milk thistle | Limited | | |
| Solanum aviculare * | New Zealand nightshade | Watch | | |
| Spartium junceum | Spanish broom | High | | |
| Tamarix aphylla | athel | Limited | | |
| Tamarix parviflora | smallflower tamarisk | High | | |
| Tamarix ramosissima | saltcedar | High | | |
| Tanacetum vulgare | common tansy | Moderate | | |
| Triadica sebifera | Chinese tallow tree | Moderate | X | |
| Verbascum thapsus | woolly mullein | Limited | | |
| Verbena bonariensis * | tall vervain | Watch | | |
| Vinca major | periwinkle | Moderate | | |
| Washingtonia robusta | Mexican fan palm | Moderate | X | |
| Watsonia meriana | bulbil Watsonia | Limited | | |
| Zantedeschia aethiopica | calla lily | Limited | |