Crossoglossa sotoana 
Crow garlic 
Crowded Maxillaria 
Crowpoison 
Cryptocentrum latifolium 
Curled Lepanthes 
Curled Pleurothallis 
Cyclopogon comosus 
Cymbidiella flabellata 
Cymbidium bicolor pubescens 
Cymbidium finlaysonianum 
Cymbidium lowianum 
Cymboglossum cymbidiifolium 
Cynorkis angustipetala 
Cynorkis fastigiata 
Cypress-knee helmet orchid 
Cypripedium calceolus 
Cypripedium tibeticum 
Cyprus Bee Orchid 
Cyrillic garlic 
Cyrtochilum aemulum 
Cyrtochilum annulare 
Cyrtochilum auropurpureum 
Cyrtochilum divaricatum