Walking fern may refer to two species of fern in the genus Asplenium, which are occasionally placed in a separate genus Camptosorus. The name "walking fern" derives from the fact that new plantlets grow wherever the arching leaves of the parent touch the ground, creating a walking effect. Both have evergreen, undivided, slightly leathery leaves that are triangular and taper to a thin point. On the bottom of the leaves, sori, or spore-bearing structures, cluster along the veins. These hardy plants can be found in shady spots of limestone ledges and limy forest places.
Asplenium rhizophyllum (syn: Camptosorus rhizophyllum), native to North America
Asplenium ruprechtii (syn: Camptosorus sibiricus), native to East Asia
It may also refer to: Adiantum caudatum, a species of maidenhair fern
References
"walking fern." Encyclopædia Britannica. . Encyclopædia Britannica Online. <http://www.britannica.com/eb/article-9075948>.