United Kingdom

Caucasian Mullein

Verbascum pyramidatum

Caucasus catmint

Nepeta grandiflora

Carline Thistle Leafhopper

Euscelis venosa

Carolina fanwort

Cabomba caroliniana

Carolina Lovegrass

Eragrostis pectinacea

Carolina mosquitofern

Azolla caroliniana

Carolina poplar

Populus canadensis

carpet beetle

Attagenus trifasciatus

Carpet Box

Pachysandra terminalis

Carthusian snail

Monacha cartusiana

Caruana's slug

Deroceras invadens

Caspic willow

Salix acutifolia

Celandine

Chelidonium majus

Cemetary Spurge

Euphorbia cyparissias

Centipede

Mecistocephalus maxillaris

Cerambyx Longicorn

Cerambyx cerdo

Chameleon

Houttuynia cordata

Chamois Ragwort

Senecio doronicum

Chattonella marina

Checkerberry

Gaultheria procumbens

Chestnut Blight

Cryphonectria parasitica

Chinese Fountain-bamboo

Fargesia spathacea

Chinese Foxtail

Setaria faberi

Chinese Mallow

Malva verticillata

Chinese Pokeweed

Phytolacca polyandra

Chinese privet

Ligustrum sinense

Chinese Silvergrass

Miscanthus sinensis

Chinese Teaplant

Lycium chinense

Chilean evening primrose

Oenothera stricta

Chinaman's hat

Calyptraea chinensis

Circular-leaved Cotoneaster

Cotoneaster hissaricus

Citrus flower moth

Prays citri

Cladosiphon zosterae

Clammy Sowthistle

Sonchus tenerrimus

Clasping heliotrope

Heliotropium amplexicaule

Clasping Henbit

Lamium amplexicaule

Clasping pepperweed

Lepidium perfoliatum

chrysalis snail

Lauria cylindracea

Chrysanthemum Gall Midge

Rhopalomyia chrysanthemi

Chrysomyxa abietis

Cinnamom Rose

Rosa majalis

Clay-Coloured Weevil

Otiorhynchus singularis

cloud grass

Agrostis nebulosa

Churchyard beetle, Cellar beetle

Blaps mucronata

cobweb spiders

Steatoda grossa

Cobweb weaver

Steatoda nobilis

Cockscomb

Celosia argentea

Coffee bean weevil

Araecerus fasciculatus

Urocystis agropyri

Cola-Nut Gall

Andricus lignicolus

Colchicum Rust

Uromyces colchici

Comb windmill grass

Chloris pectinata

Colonial Sea Squirt

Botrylloides violaceus

Colorado Beetle

Leptinotarsa decemlineata

Common catchfly

Silene gallica

Common Dodder

Cuscuta gronovii

Common dogmustard

Erucastrum gallicum

Common Crocus

Crocus vernus

Common Forget-Me-Not

Myosotis arvensis

common freshwater amphipod

Gammarus pulex