List of invasive plant species in Oregon

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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

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