There are many species in the Genus Costus. These are commonly referred to as New World Gingers, Spiral Gingers, Crepe Gingers, Button Gingers, and even Step Ladder Gingers. They aren’t related to the Old World Gingers of which a few species give us the edible ginger root which we use in cooking. They do give a great tropical look and the flowers do attract butterflies and hummingbirds. Whatever you call them, if you just ask for Costus, most people will know what you are looking for.
Richard Lyons Nursery has several different species for sale.