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.
Russian Lance is a synonym of Rubra nerva.
Canna 'Russian Red' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Schwabenland' is a tall Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Sentinel' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Sky Hawk requires research.
Canna 'Sophia Young' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Canna 'Sophie Buchner' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'South Pacific Scarlet' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Canna 'Souvenir de Madame Crozy' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Souvenir de Robert Owen' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Souvenir de Roussain' is a medium-sized cultivar, with green leaves and red flowers.
Canna 'Spiderman' is a giant Foliage Group cultivar, with green leaves and red flowers.
Canna 'Stadtrath Heidenreicht' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Statue of Liberty' is a tall Italian Group cultivar, with dark leaves and red flowers.
Canna 'Strasbourg' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Südfunk' is a small Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Sunburn' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Sunburst is a synonym of Bavaria.