Professor Treub requires research.
Canna 'Professor Wendt' is a medium-sized Crozy Group cultivar, with dark leaves and red flowers.
Progrès requires research.
Progression requires research.
Proserpine requires research.
pruinosa Hoffmanns., Verz. Pfl.-Kult. is a synonym of glauca var. glauca.
Canna 'Puck' is a small Premier Group cultivar, with green leaves and yellow flowers.
pulchra Bouché ex Horan. is a synonym of indica var. indica.
pulchra Hassk. is a synonym of indica var. indica.
Pun Bai Lai requires research.
Canna 'Puppet' is a medium-sized Crozy Group cultivar, with dark leaves and orange flowers.
Canna 'Purpurea Floribunda' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Purpurea hybrida' is a medium-sized Foliage Group cultivar, with green leaves and yellow flowers.
Canna 'Purpurea spectabilis' is a tall Foliage Group cultivar, with dark leaves and red flowers.
Canna 'Pygmy Flame' is a miniature Miniature Group cultivar, with green leaves and red flowers.
Quasimodo requires research.
Queen Anne is a synonym of Mrs Kate Gray.
Queen Charlotte is a synonym of Kønigen Charlotte.
Queen Elizabeth requires research.
Queen Ellenor requires research.