Adiantum viridimontanum, commonly known as Green Mountain maidenhair fern, is often a rare fern located only in outcrops of serpentine rock inside New England and Eastern Canada. The particular leaf blade can be cut into finger-like segments, themselves once-divided, that are borne on this outer side of any curved, dark, polished rachis. These finger-like segments are certainly not individual leaves, but areas of a single chemical substance leaf.