coccinea var. bicolor Kraenzl. is a synonym of indica var. indica.
coccinea var. sylvestris (Roscoe) Regel is a synonym of tuerckheimii.
Cogolin requires research.
Cole Series requires research.
Cole’s Pale is a synonym of Coles Pale Superba.
Coles Pale Superba requires research.
Colette requires research.
Colette Ronchaine requires research.
Canna 'Colibri' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Colobri requires research.
Canna 'Colomars' is a medium-sized cultivar, with dark leaves and red flowers.
Canna 'Colonel Buisson' is a medium-sized cultivar, with green leaves and multi-coloured flowers.
Colonel Darthail requires research.
Colonel Denfert requires research.
Canna 'Colonel Dodds' is a small cultivar, with green leaves and red flowers.
Colonel Doods is a synonym of Colonel Dodds.
Colonel Vaillard requires research.
Canna 'Colonel Voillard' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Color Clown is a synonym of Percy Lancaster.
Colorado requires research.