You Will Get 5 Seeds Tacca Chanteri Bat Flower Unusual Black Flowers. It is a beautiful and unusual plant that gets unique black flowers that are shaped like bats and great exotic green foliage.. They are tender, so they are only hardy in tropical and warm subtropical areas, but they make great houseplants, and they grow best in part sun to moderate shade.. They would make excellent additions to your rare plant collection, or just make a unique statement in your yard.