Latin name: Acaena novae-zelandiaeImage credit: GBNNSS American Mink American Skunk-cabbage American Slipper Limpet Carpet Sea Squirt Curly waterweed Floating Pennywort Giant Hogweed Himalayan Balsam Japanese Knotweed New Zealand Pigmyweed Pacific oyster Parrot's-feather Pirri Pirri Burr Quagga mussel Red Eared Terrapin Water Fern Water Primrose Zebra mussel