Canna 'Chevreuil' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'China Ruby' is a medium-sized cultivar, with green leaves and red flowers.
Canna 'Chocolate Cherry' is a medium-sized cultivar, with dark leaves and red flowers.
Cincinnati Riot requires research.
Canna 'Cinnabarina' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Cipières' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Clans' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Clauda' is a medium-sized cultivar, with green leaves and red flowers.
coccinéa is a synonym of coccinea.
Canna 'Colomars' is a medium-sized cultivar, with dark leaves and red flowers.
Canna 'Colonel Dodds' is a small cultivar, with green leaves and red flowers.
Canna 'Colossal' is a medium-sized cultivar, with green leaves and red flowers.
Canna 'Columbia' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Commandant Faurax' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'compacta' is a medium-sized species, with green leaves and red flowers.
Canna 'compacta f. Robert Kemp' is a small species, with green leaves and red flowers.
Canna 'compacta Roscoe x 'Rachael Kemp'' is a medium-sized Foliage Group cultivar, with green leaves and red flowers.
Canna 'Comtesse d'Hauteville' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Copper Giant' is a tall Crozy Group cultivar, with green leaves and red flowers.
Canna 'Corrida' is a small Crozy Group cultivar, with green leaves and red flowers.