United Kingdom

American Cupped Oyster

Crassostrea virginica

silver-washed fritillary

Argynnis paphia

Common Milkweed

Asclepias syriaca

Common Lilac

Syringa vulgaris

Common Lavender

Lavandula angustifolia

Common Knotweed

Polygonum arenastrum

Asiatic Dayflower

Commelina communis

Argentina Vervain

Verbena bonariensis

Common iceplant

Mesembryanthemum crystallinum

Common Houseleek

Sempervivum tectorum

Asian Skunk-cabbage

Lysichiton camtschatcensis

Common Horse Chestnut

Aesculus hippocastanum

Common Hop-Tree

Ptelea trifoliata

Asian Longhorned Beetle

Anoplophora glabripennis

Arctic dwarf birch

Betula nana

American Cress

Barbarea verna

Alberta Spruce

Picea glauca

African asparagus fern

Asparagus asparagoides

Adam's Leedle

Yucca gloriosa

Abutilon-Hemp

Abutilon theophrasti

Common Honey-Locust

Gleditsia triacanthos

Common Grapevine

Vitis vinifera

Asian Hornet

Vespa velutina

Common Geranium Bronze

Cacyreus marshalli

Asian China-mark

Elophila difflualis

Arctic cancellate chiton

Leptochiton cancellatus

Common Garden Poppy

Papaver somniferum

common freshwater amphipod

Gammarus pulex

Asian Bittersweet

Celastrus orbiculatus

Common Forget-Me-Not

Myosotis arvensis

Asian Ambrosia Beetle

Xyleborinus attenuatus

Arborvitae Leafminer

Argyresthia thuiella

American Cranberry

Vaccinium macrocarpon

Common Flax

Linum usitatissimum

Common Crocus

Crocus vernus

Ashy Cinquefoil

Potentilla inclinata

Common dogmustard

Erucastrum gallicum

Common Dodder

Cuscuta gronovii

Ascochyta syringae

common-cypress

Cupressus sempervirens

Auricula

Primula auricula

Common catchfly

Silene gallica

Common carpetgrass

Axonopus fissifolius

Aubretia

Aubrieta deltoidea

Apple Of Peru

Nicandra physalodes

American Comb Jelly

Mnemiopsis leidyi

Albanian spurge

Euphorbia characias

Common barley

Hordeum vulgare

Atlas Poppy

Papaver atlanticum

Colorado Beetle

Leptinotarsa decemlineata

Colonial Sea Squirt

Botrylloides violaceus

Atlas Cedar

Cedrus atlantica

Apple Mint

Mentha suaveolens

Comb windmill grass

Chloris pectinata

Atlantic Surf Clam

Spisula solidissima

Colchicum Rust

Uromyces colchici

Cola-Nut Gall

Andricus lignicolus

Atlantic Stream Crayfish

Austropotamobius pallipes

Apple

Malus domestica

American Buffalo Treehopper

Stictocephala bisonia