Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Convolvulus arvensis
Field Bindweed
Coprinus niveus
Snowy Inkcap
Corchorus aestuans
East Indian Jute Mallow
Cornus capitata
Bentham's Dogwood
Corylus avellana
Hazel
Costus elegans
Stepladder Ginger
Costus pictus
Painted Spiral Ginger
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crepis capillaris
Smooth Hawk's-beard
Crithmum maritimum
Rock Samphire
Crocosmia x crocosmiiflora
Montbretia
Crocus laevigatus
Crocus (laevigatus)
Crocus neapolitanus
Spring Crocus
Crocus sativus
Saffron Crocus
Crocus tommasinianus
Early Crocus
Crossandra infundibuliformis
Firecracker Flower
Crotalaria pallida
Crotalaria
Cruciata laevipes
Crosswort
Cryptogramma crispa
Parsley Fern
Cuphea hyssopifolia
False Heather
Cuscuta epithymum
Dodder
Cycas circinalis
Queen Sago
Cyclamen hederifolium
Sowbread
Cydonia oblonga
Quince
Cygnus olor
Mute Swan
Cymbalaria muralis
Ivy-leaved Toadflax
Cymbidium ensifolium
Four-season Orchid
Cynoglossum officinale
Hound's-tongue
Cynosurus cristatus
Crested Dog's-tail
Cyperus brevifolia
Cypripedium calceolus
Lady's-slipper
Cystolepiota hetieri
Cystopteris fragilis
Brittle Bladder-fern
Cytisus scoparius
Broom
Daboecia cantabrica
St Dabeoc's Heath
Dactylis glomerata
Cock's-foot
Dactyloctenium sp.
A Crowfoot Grass
Dactylorhiza fuchsii
Common Spotted-orchid
Dactylorhiza incarnata
Early Marsh-orchid
Dactylorhiza maculata
Heath Spotted-orchid
Dactylorhiza praetermissa
Southern Marsh-orchid
Dactylorhiza purpurella
Northern Marsh-orchid
Dactylorhiza traunsteinerioides
Narrow-leaved Marsh-orchid
Daedalea quercina
Oak Mazegill
Daldinia concentrica
Cramp balls
Daphne laureola
Spurge-laurel
Datura innoxia
Pricklyburr
Datura stramonium
Thorn-apple
Daucus carota
Carrot
Deschampsia cespitosa
Tufted Hair-grass
Dianella ensifolia
Common Dianella
Dianthus deltoides
Maiden Pink
Dianthus gratianopolitanus
Cheddar Pink
Dierama argyreum
Dierama (argyreum)
Digitalis purpurea
Foxglove
Dillenia suffruticosa
Simpoh Air
Diphasiastrum alpinum
Alpine Clubmoss
Diplolepis eglanteriae
Smooth Pea Gall
Diplolepis rosae
Bedeguar gall
Dipsacus fullonum
Wild Teasel
Dipsacus pilosus
Small Teasel
Dipsacus sativus
Fuller's Teasel
Distimake quinquefolius
Rock Rosemary