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 * | Scotch thistle | 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 | ||
Rumex acetosella | sheep sorrel | Moderate | ||
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 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 | ||
Stipa tenuissima * | Mexican feathergrass | Watch | ||
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 |