Red Tiger
Canna 'Red Tiger' is a medium-sized Crozy Group cultivar, with variegated leaves and red flowers.
Red Tyrol
Canna 'Red Tyrol' is a small Crozy Group cultivar, with dark leaves and red flowers.
Red Velvet
Canna 'Red Velvet' is a tall Foliage Group cultivar, with variegated leaves and red flowers.
Red Wine
Red Wine requires research.
reevesii
reevesii is a synonym of flaccida.
reflexa Nees ex D.Dietr.
reflexa Nees ex D.Dietr. is a synonym of pedunculata Sims.
Regal Red
Regal Red is a synonym of indica f. Regal Red.
Reichskanzler Fürst Hohenlohe
Canna 'Reichskanzler Fürst Hohenlohe' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Reign of Stuttgart
Reign of Stuttgart requires research.
Reine Charlotte
Reine Charlotte is a synonym of Kønigen Charlotte.
Reiss
Reiss requires research.
Rendatleri
Rendatleri requires research.
Rendatleri rotundifolia vera
Rendatleri rotundifolia vera requires research.
Rene
Canna 'Rene' is a small Crozy Group cultivar, with dark leaves and pink flowers.
Restormel
Restormel requires research.
Revol Massot
Revol Massot requires research.
Rhea
Rhea requires research.
Rhodes
Rhodes requires research.
Rhoea
Rhoea requires research.
Rhône
Canna 'Rhône' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.