This is Tacca chantrieri, also known as Bat Flower, Cats Whiskers, Devil Flower. This tender perennial maxes out at around 3 feet high. Tacca chantrieri is unusual in the sense that it has a black flower. This amazing plant starts out with a green bloom as a pup but as it grows older the bloom turns purple, black, maroon, brown, and bronze. This breath taking tropical blooms from late Spring to early Fall and like to live in a spot where it gets about 60 percent shade. They like to drink a great deal of water and bask in high humidity. Good air circulation is very important to this plant. This is no low maintenance plant for the beginner but if you have time and patience and are up to a challenge then the black bat plant will be your masterpiece. USDA Hardiness Zones 10 to 11.