Canna 'Roi Humbert 1er' is a medium-sized Italian Group cultivar, with dark leaves and red flowers.
Canna 'Roi Soleil' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Roitelet' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Roma' is a tall Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Romagna' is a medium-sized Italian Group cultivar, with green leaves and red flowers.
Canna 'Rosa' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rosa Feurta' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rosalind' is a small Premier Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Rose Beauty' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rose Futurity' is a small Crozy Group cultivar, with dark leaves and pink flowers.
Canna 'Rose Garden' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rose Ribbons' is a small Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rosebud Cream Supreme' is a tall Australian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Rosemawr' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rosemond Coles' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Rosenkavalier' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Rosever' is a small Crozy Group cultivar, with dark leaves and pink flowers.