Canna 'Queen Mary' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Queen of Beauty requires research.
Canna 'Queen of Italy' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Queensland Arrowroot' is a giant Agriculture Group cultivar, with green leaves and red flowers.
Canna 'R. Wallace' is a small Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Ra' is a medium-sized aquatic cultivar, equally at home as a water marginal or in the border, with green leaves and yellow flowers.
Canna 'Radio' is a tall Crozy Group cultivar, with green leaves and yellow flowers.
Rayon d'Or requires research.
Razzle-Dazzle requires research.
Canna 'Red Beauty' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Red Cleopatra' is a medium-sized Italian Group cultivar, with dark leaves and red flowers.
Canna 'Red Dazzler' is a tall Premier Group cultivar, with green leaves and red flowers.
Red Fkirt requires research.
Canna 'Red Florida' is a medium-sized Foliage Group cultivar, with variegated leaves and red flowers.
Red Hots requires research.
Canna 'Red King Humbert' is a medium-sized Italian Group cultivar, with dark leaves and red flowers.
Canna 'Red Ribbons' is a small Crozy Group cultivar, with green leaves and red flowers.
Red Rocket requires research.
Canna 'Red Simplex' is a medium-sized Foliage Group cultivar, with green leaves and red flowers.
Canna 'Red Tiger' is a medium-sized Crozy Group cultivar, with variegated leaves and red flowers.