Conium maculatum
Hemlock
Conocybe tenera
Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Convolvulus arvensis
Field Bindweed
Coprinus comatus
Shaggy Inkcap
Coprinus micaceus
Glistening Inkcap
Coprinus niveus
Snowy Inkcap
Coprinus picaceus
Magpie Inkcap
Cordyceps militaris
Scarlet Caterpillarclub
Cornus capitata
Bentham's Dogwood
Cornus sanguinea
Dogwood
Corylus avellana
Hazel
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Crassula helmsii
New Zealand Pigmyweed
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crataegus rhipidophylla
Crepidotus spp.
Crepis biennis
Rough Hawk's-beard
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crepis vesicaria
Beaked Hawk's-beard
Crithmum maritimum
Rock Samphire
Crocosmia x crocosmiiflora
Montbretia
Crocus neapolitanus
Spring Crocus
Crocus nudiflorus
Autumn Crocus
Crocus speciosus
Bieberstein's Crocus
Crocus tommasinianus
Early Crocus
Crocus x luteus
Yellow Crocus
Cruciata laevipes
Crosswort
Cryptogramma crispa
Parsley Fern
Cryptomeria japonica
Japanese Red-cedar
Cuscuta epithymum
Dodder
Cuscuta europaea
Greater Dodder
Cymbalaria muralis
Ivy-leaved Toadflax
Cynoglossum officinale
Hound's-tongue
Cynosurus cristatus
Crested Dog's-tail
Cyrtomium fortunei
Fortune's cyrtomium
Cystoderma amianthinum
Cystolepiota hetieri
Cystopteris fragilis
Brittle Bladder-fern
Cytisus scoparius
Broom
Daboecia cantabrica
St Dabeoc's Heath
Dactylis glomerata
Cock's-foot
Dactylorhiza
Dactylorhiza fuchsii
Common Spotted-orchid
Dactylorhiza incarnata
Early Marsh-orchid
Dactylorhiza kerryensis
Irish Marsh-orchid
Dactylorhiza maculata
Heath Spotted-orchid
Dactylorhiza praetermissa
Southern Marsh-orchid
Dactylorhiza purpurella
Northern Marsh-orchid
Dactylorhiza purpurella and incarnata
Marsh Orchids
Dactylorhiza spp.
Dactylorhiza traunsteinerioides
Narrow-leaved Marsh-orchid
Dactylorhiza x formosa
Dactylorhiza x grandis
Daedalea quercina
Oak mazegill
Daldinia concentrica
Cramp balls
Danthonia decumbens
Heath-grass
Daphne laureola
Spurge-laurel
Daphne mezereum
Mezereon
Darmera peltata
Indian-rhubarb
Datura stramonium
Thorn-apple
Daucus carota
Carrot
Deschampsia cespitosa
Tufted Hair-grass
Deschampsia setacea
Bog Hair-grass
Dianthus deltoides
Maiden Pink
Dianthus gratianopolitanus
Cheddar Pink
Diascia barberae
Barber’s diascia