Gymnocarpium Dryopteris, commonly referred to as Oak Fern, is a species of fern that can be found in various regions across the globe. While the scientific name Gymnocarpium Dryopteris may not ring any bells for most people, there are several common synonyms that people often use to refer to this fern. Some of the most commonly used synonyms for Gymnocarpium Dryopteris include Dryopteris spinulosa, Polypodium dryopteris, and Thelypteris dryopteris. These synonyms can come in handy when communicating with others who may not be familiar with the scientific name for this type of fern.