Giant Crimson requires research.
Canna 'Giant Red' is a tall Foliage Group cultivar, with green leaves and red flowers.
Giant White is a synonym of Tall White.
gigantea is a synonym of tuerckheimii f. Gigantea.
Gigantea major requires research.
Gigantea rubra requires research.
Gilder requires research.
Canna 'Giselle' is a medium-sized Crozy Group cultivar, with green leaves and yellow flowers.
Canna 'Gladiator' is a medium-sized Crozy Group cultivar, with green leaves and multi-coloured flowers.
Gladiflora is a synonym of Gladioflora.
Gladioflora requires research.
Canna 'Gladstone' is a small Crozy Group cultivar, with green leaves and multi-coloured flowers.
glauca is a synonym of glauca var. glauca.
Canna 'glauca f. Caroni' is a small species, with green leaves and white flowers.
Canna 'glauca f. Davia' is a medium-sized aquatic cultivar, equally at home as a water marginal or in the border, with green leaves and yellow flowers.
Canna 'glauca f. Peach Delight' is a medium-sized aquatic cultivar, equally at home as a water marginal or in the border, with green leaves and pink flowers.
glauca rubro lutea is a synonym of glauca var. rubrolutea Hook.
glauca var. angusta J.W.Richardson is a synonym of glauca var. glauca.
glauca var. annaei Petersen is a synonym of Annei.
Canna 'glauca var. flava (Michx. ex Lam.) Willd.' is a medium-sized cultivar, with green leaves and yellow flowers.