Brick canna is a synonym of discolor var. discolor (Lindl.) Nb.Tanaka.
Canna 'Bridal Veil' is a medium-sized Crozy Group cultivar, with dark leaves and white flowers.
Bridesmaid requires research.
Canna 'Brillant' is a small Crozy Group cultivar, with green leaves and red flowers.
Canna 'Brilliant' is a small Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Britannia' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Brocade (1) requires research.
Canna 'Brocade (2)' is a medium-sized Crozy Group cultivar, with green leaves and pink flowers.
Bronze Bedder requires research.
Bronze Poitevin requires research.
Canna 'Bubblegum' is a medium-sized Premier Group cultivar, with green leaves and pink flowers.
Canna 'Bunny' is a small Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Burbank' is a medium-sized Italian Group cultivar, with green leaves and yellow flowers.
Canna 'Burgundia' is a medium-sized Italian Group cultivar, with green leaves and multi-coloured flowers.
Canna 'Burgundy Blush' is a giant Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Buttercup' is a small Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Butterfly Kisses' is a medium-sized aquatic cultivar, equally at home as a water marginal or in the border, with green leaves and pink flowers.
Canna 'Butterscotch' is a small Crozy Group cultivar, with green leaves and yellow flowers.