Asplenium montanum is commonly known as the mountain spleenwort, a simple reflection of the scientific name. It is a small but intricately divided fern of acid rocks. Typically, it grows in rock crevices into which moisture seeps from within the rock strata. It is peculiar to the Appalachian domain.
The mountain spleenwort is the parent of a number of Asplenium hybrids

Asplenium hybrids

The fern genus Asplenium is well-known for its hybridization capacity, especially in temperate zones.-North American Asplenium Hybrid Complex:...

 (including species of hybrid origin), most notably the species Bradley's spleenwort, Asplenium bradleyi

Asplenium bradleyi

Bradley's spleenwort, Asplenium bradleyi, is a rare rock fern of the Appalachian area of eastern North America. It is a species of hybrid origin. The parents are Asplenium montanum and Asplenium platyneuron. The hybrid became a species with a doubling of the chromosome number, hence this species...

, and the lobed spleenwort, Asplenium pinnatifidum

Asplenium pinnatifidum

Asplenium pinnatifidum is known as the lobed spleenwort or pinnatifid spleenwort. It is an Appalachian rock fern, growing in rock crevices in moderately acid to subacid strata. It is often confused with Asplenium bradleyi....

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