Genus Cyathea, which is commonly known as tree ferns, is a group of about 600 species that are widely distributed across the world. There are several synonyms for the term Genus Cyathea, which can be used interchangeably. These include tree ferns, Dicksonia, Alsophila, Hemitelia, and Nephelea. The term tree ferns is often used to describe the group of ferns because of their tree-like habit and appearance. Dicksonia is another common synonym for Genus Cyathea, and it is used to describe the large, tree-like ferns that are found in Australia and New Zealand. Overall, the synonyms for Genus Cyathea help to provide a better understanding of this unique group of ferns.