Non-native Invasive Plant Species Information

Medium Impact / Risk for Ireland

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What are Medium Risk / Impact, Alien (non-native) Invasive Plant Species?

In addition to the European Communities (Birds and Natural Habitats) Regulations 2011 - Annex 2 (Part 1) list, Biodiversity Ireland also maintains a list of 'non-native' invasive alien species classifying the impact and risk posed by non-native species in Ireland as 'high risk' and 'medium risk' together with an additional 'watch list'.

 

Click here to learn more about Biodiversity Ireland's assessment process.

 

Japanese Knotweed Killers have conducted extensive research and collected detailed information to produce guides for all non-native plant species introduced accidentally or deliberately into the wild where they are not normally found. 

 

Non-native species often out compete native species for natural resources causing adverse impacts on the environment.

 

Invasive species can also have significant impacts on conservation and economic interests and may in some cases pose threats, directly or indirectly, to human safety.

 

Reversing the damage of invasive species is a significant land management issue for public authorities as well as for private landowners and can be a costly and labour intensive exercise.

 

Is Having An Invasive Species On My Property Illegal?

Generally having any invasive species listed under annex 2 of the S.I. No. 477/2011 - European Communities (Birds and Natural Habitats) Regulations 2011, on your property does not break the law.

 

Allowing any recognised (currently 35 - see below) invasive species to spread outside your property is another matter.... You could be liable for damages, legal costs and remedial costs if you allow an invasive species onto your neighbour's property or public / local authority area.

Non-native species subject to restrictions under EC Regulations 49 and 50

 

Click on a species from the following list to find out more

Species Common Name - Scientific Name

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PDF

Record A Sighting

Non-Native Plant Species identified as High Risk on Ireland's Biodiversity List...

Species name 

Fallopia x bohemica

Elodea canadensis

Prunus laurocerasus

Gunnera tinctoria

Spartina anglica

Lagarosiphon major

Hydrocotyle ranunculoides

Nymphoides peltata

Heracleum mantegazzianum

Fallopia sachalinensis

Impatiens glandulifera 

Carpobrotus edulis

Undaria pinnatifida

Fallopia japonica

Crassula helmsii

Elodea nuttallii

Myriophyllum aquaticum

Rhododendron ponticum

Ludwigia grandiflora

Sargassum muticum

Environment 

Terrestrial

Freshwater

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Terrestrial

Marine

Freshwater

Freshwater

Freshwater

Terrestrial

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Marine

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Freshwater

Freshwater

Freshwater

Terrestrial

Freshwater

Marine

Risk score 

20

19

18

19

18

19

21

20

19

18

18

19

19

20

20

19

20

20

20

18

Additional Non-Native Plant Species identified as Medium Risk on Ireland's Biodiversity List...

Common name 

African woodsorrel

American skunk cabbage

Annual bur-sage

Antithamnionella ternifolia

Barberry

Black currant

Brazilian waterweed

Butterfly-bush

Canadian-fleabane

Clover broomrape

Creeping Bellflower

Dead man's fingers

Douglas fir

Early goldenrod

False acacia

Field penny-cress

Garden lupin

Giant rhubarb

Hairy rocket

Himalayan honeysuckle

Himalayan knotweed

Holm oak

Japanese barberry

Japanese honeysuckle

Japanese rose

Leafy spurge

Least duckweed

Montbretia

Narrow-leaved ragwort

New Zealand bur

Ostrich fern

Pampas grass

Pitcherplant

Red oak

Red sheath tunicate

Rock cotoneaster

Rum cherry

Russian-vine

Salmonberry

Sea-buckthorn

Sycamore

Three-cornered garlic

Traveler's-joy

Tree of heaven

Turkey oak

Virginia-creeper

Warty cabbage

Water fern

Wild parsnip

Species name 

Oxalis pes-caprae

Lysichiton americanus

Ambrosia artemisiifolia

Antithamnionella ternifolia

Berberis vulgaris

Ribes nigrum

Egeria densa

Buddleja davidii

Conyza canadensis

Orobanche minor

Campanula rapunculoides

Codium fragile ssp. tomentosoides

Pseudotsuga menziesii

Solidago gigantea

Robinia pseudoacacia

Thlaspi arvense

Lupinus polyphyllus

Gunnera manicata

Erucastrum gallicum

Leycesteria formosa

Persicaria wallichii

Quercus ilex

Berberis thunbergii

Lonicera japonica

Rosa rugosa

Euphorbia esula

Lemna minuta

Crocosmia x crocosmliflora

Senecio inaequidens

Acaena ovalifolia

Matteuccia struthiopteris

Cortaderia selloana

Sarracenia purpurea

Quercus rubra

Botrylloides violaceus

Cotoneaster horizontalis

Prunus serotina

Fallopia baldschuanica

Rubus spectabilis

Hippophae rhamnoides

Acer pseudoplatanus

Allium triquetrum

Clematis vitalba

Ailanthus altissima

Quercus cerris

Parthenocissus quinquefolia

Bunias orientalis

Azolla filiculoides

Pastinaca sativa

Environment 

Terrestrial

Terrestrial

Terrestrial

Marine

Terrestrial 

Terrestrial

Freshwater

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial 

Marine 

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial

Terrestrial

Terrestrial 

Terrestrial

Terrestrial

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial

Terrestrial 

Freshwater 

Terrestrial

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial  

Terrestrial 

Terrestrial 

Marine 

Terrestrial 

Terrestrial 

Terrestrial

Terrestrial

Terrestrial

Terrestrial 

Terrestrial

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial 

Terrestrial 

Freshwater 

Terrestrial

Risk score 

14

15

17

15

14

14

17

17

14

17

16

16

15

14

17

17

17

16

17

14

16

14

14

15

14

16

14

15

16

14

14

14

14

14

14

14

17

14

14

14

15

15

17

17

14

16

15

14

15