Coq d’Or is a synonym of Oiseau d'Or.
Canna 'Cora' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Corail' is a small Crozy Group cultivar, with dark leaves and orange flowers.
Coral Rose requires research.
Cornelius Cole requires research.
Coronet requires research.
Canna 'Corrida' is a small Crozy Group cultivar, with green leaves and red flowers.
Corsaire requires research.
Canna 'Corsica' is a small Premier Group cultivar, with green leaves and multi-coloured flowers.
Cosmic Dragon requires research.
Canna 'Cosmopolitan' is a small Foliage Group cultivar, with green leaves and red flowers.
Costa Rica Red requires research.
Cote d'Or is a synonym of Côte d'Or.
Canna 'Côte d’Or' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Count Horace de Choiseul is a synonym of Comte Horace de Choiseul.
Countess of Willingdon requires research.
Courségoules requires research.
Cousin Jacob requires research.