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.
Canna 'Compte de Bouchaud' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Comte Horace de Choiseul requires research.
Canna 'Comtesse d'Hauteville' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Comtesse de Bouchaud' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Conestoga' is a medium-sized Conservatory Group cultivar, with green leaves and yellow flowers.
Canna 'Confetti' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Confetti Pink requires research.
Canna 'Confetti(2)' is a small Crozy Group cultivar, with green leaves and white flowers.
Canna 'Constitution' is a medium-sized Conservatory Group cultivar, with dark leaves and pink flowers.
Canna 'Copicana' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Canna 'Copper Giant' is a tall Crozy Group cultivar, with green leaves and red flowers.
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.
Canna 'Corrida' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Corsica' is a small Premier Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Cosmopolitan' is a small Foliage Group cultivar, with green leaves and red flowers.
Costa Rica Red requires research.