Canna 'Carousel' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Carrillon requires research.
Canna 'Castagniès' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Casteldor' is a small Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Celine Lover' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Centenaire de Rozain-Boucharlat' is a medium-sized Premier Group cultivar, with green leaves and pink flowers.
Centennial is a synonym of Merle Cole.
Canna 'Centurion' is a tall Crozy Group cultivar, with green leaves and orange flowers.
Canna 'Cerase' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Cerise Beauty' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Cerise Bell' is a medium-sized Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Cerise Davenport' is a medium-sized Foliage Group cultivar, with green leaves and pink flowers.
Chaméléon is a synonym of Chameleon.
Canna 'Champigny' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Champion (1)' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Canna 'Champion (2)' is a medium-sized Crozy Group cultivar, with dark leaves and pink flowers.
Canna 'Chanteclair' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Chappaqua' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Charge' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Charise' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.