Ferns found here include wall rue, maidenhair spleenwort, brittle bladder-fern, Hart's-tongue and hard shield-fern. Asplenium adiantum-nigrum is a common species of fern known by the common name black spleenwort. A triploid hybrid between walking fern and Tutwiler's spleenwort was accidentally produced in culture. Asplenium bulbiferum, known as mother spleenwort, is a fern species native to New Zealand only. Neither black-stemmed spleenwort nor the other pinnate American spleenworts have dimorphic fertile and sterile fronds. "typicum" for the normal form of ebony spleenwort. Asplenium viride is known as the green spleenwort because of its green stipes and rachides. The vulnerable Shore Spleenwort ("Asplenium obtusatum") still survives there. This feature easily distinguishes this species from the very similar-looking maidenhair spleenwort, "Asplenium trichomanes". He made it to resemble the black spleenwort, "Asplenium adiantum-nigrum". A good example of this is the currently designated species "Asplenium trichomanes" (maidenhair spleenwort). The ebony spleenwort is sometimes grown as a terrarium or garden plant. The ebony spleenwort "A. platyneuron" is also sometimes sold in nurseries as a hardy plant. Principal species found on the Gwydir mine sites are pennycress and forked spleenwort. Similar buds have also been reported from the single-sorus spleenwort, "Asplenium monanthes".