Genus Gleichenia is a group of ferns that belong to the Gleicheniaceae family. There are several synonyms that are commonly used to refer to these ferns, including the umbrella fern, coral fern, and fan fern. The name "umbrella fern" comes from the shape of the fronds, which are often arranged in a circular pattern resembling an umbrella. "Coral fern" refers to the coral-like appearance of the fronds when they are covered in small bumps or spines. Lastly, "fan fern" describes the shape of the fronds which are often wide and flat like a fan. No matter what name you choose, these ferns are an interesting addition to any garden or natural setting.