Microsorum Pteropus, also commonly known as Java Fern, is a water fern originating from Indonesia. Ideally, it should be attached to rock or wood. If planted in a substrate, do not cover the rhizome because it will rot. It is easy to propagate by splitting the horizontal rhizome. It is a very hardy plant that grows in all conditions and is a very popular beginner plant. The black spots under the leaves are sporangia (reproductive organs), not signs of disease, as many believe.