Canna 'Showman' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
siamensis Kraenzl. is a synonym of glauca var. glauca.
Canna 'Sicilia' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Signor Wundurlick requires research.
Signor Wundurlik is a synonym of Signor Wundurlick.
Sincerity requires research.
Singapore Girl requires research.
Sir John Anderson requires research.
Sir Trevor Lawrence requires research.
Sirius requires research.
Sirocco requires research.
Sky Hawk requires research.
Smithii requires research.
Snow Bowl requires research.
Snow Candy is a synonym of Confetti.
Snow Dragon requires research.
Canna 'Snow White' is a small Crozy Group cultivar, with green leaves and white flowers.
Society Belle is a synonym of indica f. Society Belle.
Solar Flare requires research.