The Guide to the Non-Native Invasive Plants of Britain and Ireland features 31 species of land plants covered by legislation in UK and Republic of Ireland. These are plants that are causing problems and impacting on local biodiversity due to their aggressive growth.
Plants include Japanese knotweed, American skunk-cabbage, variegated yellow archangel, yellow azalea, pirri-pirri bur, perfoliate alexanders and several species of cotoneaster. Text on the reverse side specifies the current legal status of each invasive plant. Different legislation applies in England, Wales, Scotland, Northern Ireland and Republic of Ireland. All make it a criminal offence to plant or cause to grow in the wild a listed invasive non-native plant.