is a specific kind of: fern.

is a broader term that covers: Asplenium adiantum-nigrum, black spleenwort | Asplenium platyneuron, ebony spleenwort, Scott's Spleenwort | black-stem spleenwort, black-stemmed spleenwort, little ebony spleenwort | Asplenium rhizophyllum, Camptosorus rhizophyllus, walking fern, walking leaf | Asplenium trichomanes, maidenhair spleenwort | Asplenium viride, green spleenwort | Asplenium montanum, mountain spleenwort | Asplenium ruta-muraria, wall rue, wall rue spleenwort | Asplenium bradleyi, Bradley's spleenwort | Asplenium pinnatifidum, lobed spleenwort | Asplenium billotii, lanceolate spleenwort ... show more.

is a member of: Asplenium, genus Asplenium.