This is a water fern from Asia, 15-30 cm tall. To be grown on a root or stone, attached with fishing line until it has gained a hold. If planted in the bottom, do not cover the rhizome because it will rot. It is easy to propagate by splitting the horizontal rhizome. It is an all around hardy plant that grows in all conditions. The black spots under the leaves are sporangia (reproductive organs), not signs of disease, as many believe.