Blechnum spicant, commonly known as hard fern, is a species of fern found in Europe, Asia and North America. While 'hard fern' is its most common name, there are other synonyms used to refer to Blechnum spicant, such as deer fern, common toad fern, and rustyback. These synonyms refer to the fern's unique characteristics such as its suitability as a food source for deer, its resemblance to the skin of a toad, and its rusty brown undersides. Although these names are not as commonly used as hard fern, they offer a glimpse into the plant's history and the various cultures that have interacted with it.