Begonia requires research.
Canna 'Bejewelled' is a medium-sized Premier Group cultivar, with green leaves and orange flowers.
Canna 'Beloved' is a medium-sized Crozy Group cultivar, with green leaves and white flowers.
Canna 'Ben Thumb' is a miniature Miniature Group cultivar, with green leaves and red flowers.
Canna 'Bengal Tiger' is a medium-sized Italian Group cultivar, with variegated leaves and orange flowers.
Canna 'Berenice Emsley' is a medium-sized Premier Group cultivar, with green leaves and red flowers.
Canna 'Beslon Rouge' is a medium-sized Premier Group cultivar, with dark leaves and red flowers.
Canna 'Bethany' is a medium-sized Italian Group cultivar, with variegated leaves and multi-coloured flowers.
Canna 'Betsy Ross' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Bevere' is a small Premier Group cultivar, with green leaves and multi-coloured flowers.
Beyadère requires research.
Bharat requires research.
Biarritz is a synonym of Wyoming.
Canna 'Bibi Dalebø' is a small Crozy Group cultivar, with green leaves and pink flowers.
Canna 'Biercée' is a medium-sized Crozy Group cultivar, with green leaves and white flowers.
Canna 'Biesme-sous-Thuin' is a medium-sized Premier Group cultivar, with green leaves and yellow flowers.
Canna 'Bihorelli' is a medium-sized Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Biot' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Bird of Paradise' is a tall Foliage Group cultivar, with variegated leaves and pink flowers.
Canna 'Bittersweet' is a medium-sized Crozy Group cultivar, with green leaves and orange flowers.