The sporangium is the capsule in which the fern spores mature and the mechanism that then disperses them into the air. The two ends of the sporangium form the "bag" in which the spores mature. The sporangium is attached to the underside of the fern leaflet by the fibrous sporangiophore. When the spores are mature the sporangium releases the spores forcefully by snaping open.
Licorice Fern, Polypodium glycyrrhiza, is found in the Northwest forests of North America and inland along some river valleys. It is often found growing on the moss covered bark side of maple trees.