× Ca
, × Calamicromeria , × Calammophila , × Calassodia , × Calicharis , × Carduocirsium , × Carduogalactites , × Carpophyma , × Carruanthophyllum , × Catyclia
× Ce
, × Celmearia , × Centauserratula , × Cephalopactis , × Cephalorchis , × Cepheliocereus , × Cerapadus , × Cerasolouiseania
× Ch
, × Chamaebivia , × Chamaezicactus , × Cheirysimum , × Chiranthomontodendron , × Chitalpa , × Chrysaboltonia , × Chrysanthemoachillea
× Ci
, × Cirsiocarduus , × Citroncirus
× Cl
, × Cleistocana , × Clinomicromeria , × Cliveucharis
× Co
, × Coeloglossogymnadenia , × Coeloglossorchis , × Colycea , × Colymbacosta , × Comptoglossum , × Conygeron
× Conyzigeron Rauschert
- × Conyzigeron × huelsenii (Vatke) Rauschert
Angiospermae → Magnoliopsida → Asterales → Asteraceae , × Cooperanthes , × Coracaea , × Coromelandrium
× Cr
, × Crataegomespilus , × Crataegosorbus , × Crataemespilus , × Crepi-Hieracium , × Crimocharis , × Crindonna
× Cy
, × Cyanthera , × Cydolus , × Cynochloris