Live Aquatic Plant Dwarf Nymphaea Pygmaea Helvola Hardy Water Lilies Tuber for Aquarium Freshwater Fish Pond by Greenpro This is live water lilly tuber. Nymphaea Pygmaea Helvola Yellow (Hardy). This is miniature water lily. Perfect for any pond size. USDA Approved. Carefully inspected and organized before packing. Grown by using lastest technology and facility.