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Invasive Non-native Plant Species Ireland

African woodsorrel - Oxalis pes-caprae

American skunk-cabbage - Lysichiton americanus

Annual bur-sage - Ambrosia artemisiifolia

Antithamnionella ternifolia

Barberry - Berberis vulgaris

Black currant - Ribes nigrum

Brazilian giant-rhubarb - Gunnera manicata

Brazilian waterweed - Egeria densa

Broad-leaved rush - Juncus planifolius

Butterfly Bush - Buddleja davidii

Canadian-fleabane - Conyza canadensis

Canadian Waterweed - Elodea canadensis

Cape pondweed - Aponogeton distachyos

Cherry laurel - Prunus laurocerasus

Chilean rhubarb - Gunnera tinctoria

Clover broomrape - Orobanche minor

Cordgrass - Spartina (all species and hybrids)

Creeping Bellflower - Campanula rapunculoides

Curly Waterweed - Lagarosiphon major

Dead man's fingers - Codium fragile ssp. tomentosoides

Douglas fir - Pseudotsuga menziesii

Dwarf eel-grass - Zostera japonica

False acacia - Robinia pseudoacacia

Fanwort - Cabomba caroliniana

Field penny-cress - Thlaspi arvense

Floating Pennywort - Hydrocotyle ranunculoides

Fringed Water-Lily - Nymphoides peltata

Garden lupin - Lupinus polyphyllus

Giant Hogweed - Heracleum mantegazzianum

Giant Knotweed - Fallopia sachalinensis

Giant Salvinia - Salvinia molesta

Giant-Rhubarb - Gunnera tinctoria

Hairy rocket - Erucastrum gallicum

Himalayan Balsam - Impatiens glandulifera

Himalayan honeysuckle - Leycesteria formosa

Himalayan Knotweed - Persicaria wallichii

Holm oak - Quercus ilex

Hottentot-Fig - Carpobrotus edulis

Japanese barberry - Berberis thunbergii

Japanese honeysuckle - Lonicera japonica

Japanese Kelp - Undaria pinnatifida

Japanese Knotweed - Fallopia japonica

Japanese rose - Rosa rugosa

Large-flowered waterweed - Egeria densa

Leafy spurge - Euphorbia esula

Least duckweed - Lemna minuta

Mile-a-minute weed - Persicaria perfoliata

Narrow-leaved ragwort - Senecio inaequidens

New Zealand bur - Acaena ovalifolia

New Zealand Pigmyweed - Crassula helmsii

Nuttallii  Waterweed - Elodea nuttallii 

Ostrich fern - Matteuccia struthiopteris

Pampas grass - Cortaderia selloana

Parrots Feather - Myriophyllum aquaticum

Pitcherplant - Sarracenia purpurea

Red alga - Grateloupia doryphora

Red oak - Quercus rubra

Rhododendron - Rhododendron ponticum

Rock cotoneaster - Cotoneaster horizontalis

Rum cherry - Prunus serotina

Russian-vine - Fallopia baldschuanica

Salmonberry - Rubus spectabilis

Sea-buckthorn - Hippophae rhamnoides

Spanish Bluebell - Hyacinthoides hispanica

Sycamore - Acer pseudoplatanus

Three-cornered leek (garlic) - Allium triquetrum

Traveler's-joy - Clematis vitalba

Tree of heaven - Ailanthus altissima

Turkey oak - Quercus cerris

Virginia-creeper - Parthenocissus quinquefolia

Wakame - Undaria pinnatifida

Warty cabbage - Bunias orientalis

Water Chestnut - Trapa natans

Water Fern - Azolla filiculoides

Water Lettuce - Pistia stratiotes

Water-primrose - Ludwigia (all species)

Waterweeds - Elodea (all species)

Wild parsnip - Pastinaca sativa

Wireweed - Sargassum muticum