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.

Distinguishing it from its parents requires a close look at the fronds: asplenium pinnatifidum

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

( Asplenium rhizophyllum ): Contributes the long, tapering frond tips. A Hybrid Origin ( Asplenium rhizophyllum ): Contributes

: Its fronds narrow into a long, slender point, a trait inherited from the Walking Fern.

While nowhere is it "common," the Lobed Spleenwort is most prevalent in the Appalachian region . It has also been documented in: Asplenium - In Defense of Plants

Because it possesses a double set of chromosomes from both parents, it can reproduce on its own and is considered a true, distinct species rather than just a one-off cross. Identification Features