Rosea gigantea requires research.
Rosea Superba requires research.
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.
Rosemond Cole is a synonym of Rosemond Coles.
Canna 'Rosemond Coles' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Rosemund Cole is a synonym of Rosemond Coles.
Rosen Kavalier is a synonym of Rosenkavalier.
Rosencavalier is a synonym of Rosenkavalier.
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.
Rosita is a synonym of CannaSun™ Rosita.
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.