Thalia dealbata (Powdery Thalia)
Botanical name: Thalia dealbata
Common names: Powdery Thalia, Hardy Canna, Water Canna, Alligator Flag
Family: Marantaceae
Origin: Southeastern North America
Powdery Alligator Flag is a robust, tropical, aquatic perennial. The large, broadly lance-shaped, long-petioled leaves are covered with a white powdery coating as are all parts of the plant. The blue and purple flowers are crowded in an open panicle. Alligator Flag can reach heights of 6 feet tall and leaves as wide as 20 inches.
Similar plants: Thalia dealbata (Powdery Thalia)
Link to this plant:
https://toptropicals.com/catalog/uid/thalia_dealbata.htm