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 'speciosa (Roscoe) Hook.' is a medium-sized cultivar, with green leaves and multi-coloured flowers.
Canna 'Spritzii' is a medium-sized Foliage Group cultivar, with green leaves and orange flowers.
Canna 'Stadt Fellbach' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Canna 'Stadtrath Heidenreicht' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Canna 'Starlight' is a medium-sized cultivar, with green leaves and white flowers.
Canna 'Stars and Stripes' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Storm Boy' is a medium-sized Crozy Group cultivar, with dark leaves and orange flowers.
Canna 'Strawberry Delight' is a medium-sized Premier Group cultivar, with green leaves and pink flowers.
Canna 'Striata (1)' is a medium-sized Foliage Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Suévia' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Canna 'Suffusion' is a medium-sized Premier Group cultivar, with green leaves and pink flowers.
Canna 'Sugar and Spice' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Sun Beams' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Sunburn' is a medium-sized Crozy Group cultivar, with green leaves and red flowers.
Canna 'Sundance' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Sunnyside' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Sunset (1)_x000D_
Canna 'Sunset (1)'
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see Percy Lancaster_x000D_
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Canna 'Sunset (1)' - see Percy Lancaster
Sweetheart requires research.