Canna 'Cremora' is a medium-sized Premier Group cultivar, with green leaves and white flowers.
Canna 'Crepe L'Orange' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Canna 'Crimson Beauty' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Crimson Bedder requires research.
Canna 'Crista' is a medium-sized Premier Group cultivar, with green leaves and yellow flowers.
crocea Lag. ex Rchb. is a synonym of indica var. indica.
crocea Roem. & Schult. is a synonym of indica var. indica.
Crocodile requires research.
Cronstadt requires research.
Canna 'Croome' is a medium-sized Premier Group cultivar, with green leaves and pink flowers.
Croze Maroc requires research.
Crozy père requires research.
Csokonai requires research.
Csongor requires research.
Canna 'Cupid' is a small Crozy Group cultivar, with green leaves and pink flowers.
curviflora Horan. is a synonym of tuerckheimii Kraenzl..
Cyclop requires research.
Cyclope requires research.