San Diego requires research.
sanctae-rosae Kraenzl. is a synonym of indica var. sanctae-rosae (Kraenzl.) Nb.Tanaka.
Sangri La requires research.
Sangria requires research.
sanguinea Bouché is a synonym of indica var. indica.
sanguinea Warsz. ex Otto & A.Dietr. is a synonym of indica var. indica.
Sans Souci requires research.
Canna 'Sarah Louise' is a small Premier Group cultivar, with green leaves and pink flowers.
Saramarte requires research.
saturate-rubra Bouché ex K.Koch is a synonym of indica var. indica.
Saturne requires research.
Saumur is a synonym of Verdi.
Canna 'Savennières' is a medium-sized Crozy Group cultivar, with dark leaves and orange flowers.
Scarlet requires research.
Scarlet Beauty requires research.
Canna 'Scarlet Fever' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
Scarlet Perfection requires research.
Scarlet Sprite requires research.
Canna 'Scarlet's Rib' is a medium-sized Foliage Group cultivar, with green leaves and orange flowers.
Scented Canna is a synonym of liliiflora Warsc. ex Planch..