Cryptogramma is a plant genus that refers to small, fern-like plants that are often found in rocky environments. These plants are also commonly known as rock-ferns or hidden ferns. Some synonyms for the word cryptogramma include the Latin names of the different species within the genus such as Cryptogramma crispa, which is called curled rock-brake, and Cryptogramma stelleri, known as Steller's cryptogramma. Other synonyms for cryptogramma include rock polypody, alpine wall fern, and hidden cryptogramma. Despite their small size, cryptogramma plants are known for their hardiness and ability to thrive in harsh environments.