Citrus is a synonym of Yellow King Humbert.
Canna 'City of Gloucester' is a medium-sized Crozy Group cultivar, with dark leaves and pink flowers.
Canna 'City of Portland' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
City of Worcester requires research.
Claire requires research.
Canna 'Clans' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Clara Barton requires research.
Canna 'Clauda' is a medium-sized cultivar, with green leaves and red flowers.
Claude Bernard requires research.
Claude Brun requires research.
Claude Carme requires research.
Claude Drevet requires research.
Claude Fichet requires research.
Claude Montel requires research.
Canna 'Cleopatra' is a medium-sized Italian Group cultivar, with variegated leaves and multi-coloured flowers.
Canna 'Cleopatré' is a small Crozy Group cultivar, with green leaves and orange flowers.
Cliviaeflora requires research.
Canna 'Cloth of Gold' is a medium-sized Italian Group cultivar, with dark leaves and orange flowers.
coccinéa is a synonym of coccinea.
coccinea f. flaviflora Chodat & Hassl. is a synonym of coccinea.