While I was walking, I found this tree with amazing blue and white flowers and am really curious to know its name. It also has long strap-like leaves.
What is its name?
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This is Strelitzia nicolai, commonly known as the Giant Bird of Paradise. It is a tropical plant, native to Africa, but can be grown in USDA zone 13 with protection from the cold. It is a relative of the hardier and therefore more widely grown S. reginae (the Bird of Paradise flower), which has similar shaped flowers but in shades of orange blue and white.
The identifying characteristics are the flower, which has:
a dark blue bract, white sepals and a bluish-purple "tongue".
It can grow to 30 feet tall, and has gray-green foliage similar to banana plants.