Colorado requires research.
Canna 'Colortime' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Colossal' is a medium-sized cultivar, with green leaves and red flowers.
Colossal White requires research.
Canna 'Columbia' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Columbus requires research.
Canna 'Commandant Dubois' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Commandant Faurax' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Commandant Fournier requires research.
Commandant Marchand requires research.
Canna 'Commandant Rivière' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
commutata Bouché is a synonym of indica var. indica.
Canna 'Compact de Villée' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Compact Red requires research.
Canna 'compacta' is a medium-sized species, with green leaves and red flowers.
compacta Bouché is a synonym of indica var. indica.
Canna 'compacta f. Robert Kemp' is a small species, with green leaves and red flowers.
compacta Roscoe f. Cinnabrina requires research.
Canna 'compacta Roscoe x 'Rachael Kemp'' is a medium-sized Foliage Group cultivar, with green leaves and red flowers.