👉 Histiopteris is a genus of fungi in the family Geotrichoidaceae, which belongs to the order Hymenogastraceae and the class Polypodiinales. This group includes several species that are known for their ability to produce large colonies of mycelium, typically found on dead or decomposing plants. Histiopteris is characterized by its unique appearance, including a thick, waxy cuticle and a long, branching mycelium.