Pinnatifidum | Asplenium
: Unlike the Walking Fern, which has smooth-edged (entire) leaves, the Lobed Spleenwort has distinct lobes along the entire length of its frond.
: It typically grows in small, dense clusters directly out of cracks in shaded, damp rock faces. Where to Find It
Distinguishing it from its parents requires a close look at the fronds: asplenium pinnatifidum
( Asplenium rhizophyllum ): Contributes the long, tapering frond tips.
The ( Asplenium pinnatifidum ) is a small, evergreen fern that primarily inhabits the crevices of non-calcareous rocks, such as sandstone and shale, across the Appalachian Mountains and into the Midwest. Often overlooked by casual hikers, this rare plant is a fascinating example of evolutionary biology in action, representing a stable, fertile hybrid species. A Hybrid Origin : Unlike the Walking Fern, which has smooth-edged
: It remains green year-round, making it easier to spot on rocky outcrops during the winter months.
: Its fronds narrow into a long, slender point, a trait inherited from the Walking Fern. The ( Asplenium pinnatifidum ) is a small,
Unlike many hybrids that are sterile, Asplenium pinnatifidum is a fertile . It originated from a natural cross between two other ferns:

