Rosy Stripes requires research.
rotundifolia André is a synonym of compacta Roscoe.
Rotundifolia major requires research.
Rotundifolia metallica requires research.
Rotundifolia rubra requires research.
Rotundifolia rubra major requires research.
Rotundifolia vera requires research.
Royalty requires research.
rubra (Aiton) Willd. is a synonym of indica var. indica.
Canna 'Rubra Nerva' is a medium-sized Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Rubra Perfecta' is a medium-sized Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Rubra Superbissima' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Rubricaulis requires research.
rubricaulis Link is a synonym of indica var. indica.
Canna 'Ruby Cole' is a small Crozy Group cultivar, with green leaves and pink flowers.
Ruby Crout requires research.
Russian Lance is a synonym of Rubra nerva.