Floating pennywort
Hydrocotyle ranunculoides
Status:
Established
Habitat:
Freshwater
Threats:
Clogs waterways and negatively impacts on native species and ecosystems.
Fringed water lily
Limnanthemum peltatum, N. nymphaeoides, N. peltata
Status:
Established
Habitat:
Freshwater
Threats:
Pioneer species. Fast growing. Spreads vegetatively.
Giant hogweed
Heracleum mantegazzianum
Status:
Established
Habitat:
Terrestrial
Threats:
Public health hazard. Competition with native species.
Giant knotweed
Fallopia sachalinensis
Status:
Established
Habitat:
Terrestrial
Threats:
Quick growing and difficult to control. Habitat generalist.
Giant rhubarb
Gunnera tinctoria
Status:
Established
Habitat:
Terrestrial
Threats:
Competition with native species.
Grey squirrel
Sciurus carolinensis
Status:
Established
Habitat:
Terrestrial
Threats:
Threatens red squirrel and woodlands.
Harlequin ladybird
Harmonia axyridis
Status:
Established
Habitat:
Terrestrial
Threats:
Alert: Specimen found in Ireland.
Himalayan balsam
Impatiens glandulifera
Status:
Established
Habitat:
Terrestrial
Threats:
Competition with native plants & collapsing of river banks
Himalayan knotweed
Persicaria wallichii
Status:
Established
Habitat:
Terrestrial
Threats:
Quick growing and difficult to control. Habitat generalist.
Invasive Species Ireland

Invasive Species Ireland