Spitfire requires research.
Splendor requires research.
Canna 'Spotted Fever' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Spotted Lucifer is a synonym of Spotted Fever.
Canna 'Spritzii' is a medium-sized Foliage Group cultivar, with green leaves and orange flowers.
Sri Ban Yen requires research.
Canna 'Stadt Fellbach' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.
Stadtgartner Schmoger requires research.
Stadtgartner Sennholz requires research.
Stadtrat Heidenreich is a synonym of Stadtrath Heidenreicht.
Canna 'Stadtrath Heidenreicht' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Star of 91 requires research.
Canna 'Star of India' is a small Crozy Group cultivar, with green leaves and multi-coloured 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.
Statuaire Fulconis requires research.
Canna 'Statue of Liberty' is a tall Italian Group cultivar, with dark leaves and red flowers.
Stellar Blut is a synonym of Wyoming.
stenantha Nb. Tanaka requires research.
stolonifera D.Dietr. is a synonym of glauca var. glauca.