Coris
Coris monspeliensis
Coris monspeliensis ssp fontqueri
Coronilla
Coronilla valentina ssp glauca
Corydalis
Corynephorus
Corynephorus canescens
Cotula
Cotula hispida
Crambe
Crambe maritima
Crassula
Crassula sarcocaulis
Crassula setulosa var curta
Crassula setulosa 'Milfordiae'
Crassula socialis
Crassula tillaea
Crepis
Crepis pygmaea
Crocus
Crocus ancyrensis
Crocus chrysanthus 'Prinz Claus'
Crocus chrysanthus 'Saturnus'
Crocus chrysanthus 'Zwanenburg Bronze'
Crocus etruscus ‘Zwanenburg’
Crocus malyi 'Sveti'
Crocus sativus
Crocus speciosus 'albus'
Crocus speciosus 'cassiope'
Crocus speciosus 'conqueror'
Crocus tommasinianus 'Lilac Beauty'
Crocus tommasinianus 'Roseus'
Crocus tommasinianus 'Whitewell Purple'
Crocus vernus ssp verus
Crocus 'Jeanne d'Arc'
Crocus 'Mammoth Yellow'
Crocus ' Pickwick'
Crocus 'Queen of the Blues'
Crocus 'Remembrance'
Crocus 'Vanguard'
Cruciata
Cruciata laevipes
Cryptogramma
Cryptogramma crispa
Cuscuta
Cuscuta scandens
Cyclamen
Cyclamen coum
Cyclamen purpurascens
Cyclamen repandum
Cymbalaria
Cymbalaria muralis
Cynara
Cynara humilis
Cynoglossum
Cynoglossum creticum
Cytinus
Cytinus hypocistis
Cytisus
Cytisus purgans
Daboecia