Numerous plants have been introduced to Oregon, and many of them have become invasive species. The following are some of these species:
Picture | Scientific Name | Common Name |
---|---|---|
Ailanthus altissima | tree of heaven | |
Ammophila arenaria | marram grass | |
Brachypodium sylvaticum | false-brome | |
Bromus tectorum | drooping brome | |
Buddleja davidii | summer lilac | |
Carduus acanthoides | spiny plumeless thistle | |
Carduus nutans | musk thistle | |
Centaurea cyanus | cornflower | |
Cirsium vulgare | spear thistle | |
Clematis vitalba | old man's beard | |
Cortaderia jubata | purple pampas grass | |
Crataegus monogyna | common hawthorn | |
Cyperus rotundus | coco-grass | |
Cytisus scoparius | common broom | |
Cytisus striatus | hairy-fruited broom | |
Daphne laureola | spurge-laurel | |
Egeria densa | large-flowered waterweed | |
Elaeagnus angustifolia | Russian olive | |
Euphorbia esula | green spurge | |
Euphorbia myrsinites | myrtle spurge | |
Fallopia sachalinensis | giant knotweed | |
Foeniculum vulgare | Florence fennel | |
Genista monspessulana | French broom | |
Geranium lucidum | shining cranesbill | |
Geranium robertianum | herb-Robert | |
Hedera helix | common ivy | |
Hedera hibernica | Atlantic ivy | |
Ilex aquifolium | common holly | |
Impatiens glandulifera | impatiens | |
Iris pseudacorus | yellow flag | |
Kali tragus | prickly Russian thistle | |
Koenigia polystachya | Himalayan knotweed | |
Linaria dalmatica | Balkan toadflax | |
Linaria vulgaris | common toadflax | |
Logfia gallica | narrowleaf cottonrose | |
Lythrum salicaria | purple loosestrife | |
Phalaris arundinacea | reed canary grass | |
Pilosella aurantiaca | fox-and-clubs | |
Reynoutria japonica | Japanese knotweed | |
Rubus armeniacus | Himalayan blackberry | |
Rubus laciniatus | cutleaf evergreen blackberry | |
Salix × fragilis | crack willow | |
Spartium | Spanish broom | |
Tamarix ramosissima | saltcedar | |
Torilis arvensis | spreading hedgeparsley | |
Ulex | gorse |
Triadica sebifera is a tree native to eastern Asia. It is commonly called Chinese tallow, Chinese tallowtree, Florida aspen, chicken tree, gray popcorn tree, or candleberry tree.
Elaeagnus angustifolia, commonly called Russian olive, silver berry, oleaster, or wild olive, is a species of Elaeagnus, native to Asia and limited areas of eastern Europe. It is widely established in North America as an introduced species.
Alliaria petiolata, or garlic mustard, is a biennial flowering plant in the mustard family (Brassicaceae). It is native to Europe, western and central Asia, north-western Africa, Morocco, Iberia and the British Isles, north to northern Scandinavia, and east to northern Pakistan and Xinjiang in western China.
Natural Resources Conservation Service (NRCS), formerly known as the Soil Conservation Service (SCS), is an agency of the United States Department of Agriculture (USDA) that provides technical assistance to farmers and other private landowners and managers.
Solanum viarum, the tropical soda apple, is a perennial shrub native to Brazil and Argentina with a prickly stem and prickly leaves. The fruit is golf-ball-sized with the coloration of a watermelon. It is considered an invasive species in the lower eastern coastal states of the United States and recently on the Mid North Coast of Australia.
Tanacetum parthenium, known as feverfew, is a flowering plant in the daisy family, Asteraceae. It may be grown as an ornament, and may be identified by its synonyms, Chrysanthemum parthenium and Pyrethrum parthenium. It is used in traditional medicine.
Harrisia is a genus of night blooming cacti.
Germplasm Resources Information Network or GRIN is an online USDA National Genetic Resources Program software project to comprehensively manage the computer database for the holdings of all plant germplasm collected by the National Plant Germplasm System.
Neltuma glandulosa, formerly Prosopis glandulosa, commonly known as honey mesquite, is a species of small to medium-sized, thorny shrub or tree in the legume family (Fabaceae).
Tipuana tipu, also known as tipa, rosewood and pride of Bolivia, is a South American tree.
Lonicera maackii, the Amur honeysuckle, is a species of honeysuckle in the family Caprifoliaceae that is native to temperate eastern Asia; specifically in northern and western China south to Yunnan, Mongolia, Primorsky Krai in southeastern Siberia, Korea, and, albeit rare there, central and northern Honshū, Japan.
Andropogon virginicus is a species of grass known by several common names, including broomsedge bluestem, yellowsedge bluestem and whiskey grass. It is native to the southeastern United States and as far north as the Great Lakes. It is known as an introduced species in California and Hawaii, where it is weedy.
Polypogon monspeliensis, commonly known as annual beard-grass or annual rabbitsfoot grass, is a species of grass. It is native to the Old World, but it can be found today throughout the world as an introduced species and sometimes a noxious weed. It is an annual grass growing to heights between 5 centimeters and one meter. The soft, fluffy inflorescence is a dense, greenish, plumelike panicle, sometimes divided into lobes. The spikelets have long, thin, whitish awns, which give the inflorescence its texture.
Invasive species are a crucial threat to many native habitats and species of the United States and a significant cost to agriculture, forestry, and recreation. An invasive species refers to an organism that is not native to a specific region, this poses significant economic and environmental threats to its new habitat. The term "invasive species" can also refer to feral species or introduced diseases. Some introduced species, such as the dandelion, do not cause significant economic or ecologic damage and are not widely considered as invasive. Economic damages associated with invasive species' effects and control costs are estimated at $120 billion per year.