Canna 'International Brigade' is a medium-sized Premier Group cultivar, with dark leaves and yellow flowers.
Canna 'Intrigue' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Involventia folia requires research.
Iridescent requires research.
Canna 'iridiflora' is a medium-sized species, with green leaves and pink flowers.
Iridiflora Hybrida requires research.
Canna 'Iridiflora Rubra' is a medium-sized cultivar, with dark leaves and red flowers.
iridiflora Willd. is a synonym of tuerckheimii Kraenzl..
Iris is a synonym of iridiflora Ruiz & Pav..
Iris canna is a synonym of iridiflora Ruiz & Pav..
Isaac Casati requires research.
Isabella Breitschwerdt requires research.
Ischia requires research.
Island Series requires research.
Isobel requires research.
Canna 'Italia' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Ithaca requires research.