Polystichum aculeatum is commonly known as the hard shield fern. This beautiful and hardy plant is native to Europe, Asia, and North America and is an excellent choice for shady locations. If you are looking for synonyms for Polystichum aculeatum, some options include the sword fern, Christmas fern, or shield fern. No matter what you choose to call it, the Polystichum aculeatum is a fantastic addition to any garden or landscape. It has minimal maintenance requirements, is adaptable to different growing conditions, and provides an attractive, evergreen presence all year round. So, if you want a hardy and beautiful plant, consider the Polystichum aculeatum.