Asplenium listeri Asplenium listeri Asplenium listeri, commonly known as the Christmas Island spleenwort, is a species of fern in the Aspleniaceae family. It is endemic to Christmas Island, an Australian territory in the north-eastern Indian Ocean. Its specific epithet honours British zoologist and plant collector Joseph Jackson Lister, who visited the island on in 1887 and was the first to collect a specimen. The spleenwort is a small, terrestrial, lithophytic fern with shortly creeping rhizomes, and with fronds up to 90 mm long held in a crown. Found only on Christmas Island, the fern is known from a very small number of
Asplenium viride Asplenium viride Asplenium viride is known as the green spleenwort because of its green stipes and rachides. This feature easily distinguishes this species from the very similar-looking maidenhair spleenwort, "Asplenium trichomanes". Green spleenwort was described by Carl Linnaeus in his 1753 "Species Plantarum", under the name ""Asplenium Trich. ramosum"", with a type locality of "'" (rocks in Caernarfonshire). Under the rules of the International Code of Botanical Nomenclature, phrase names such as ""Asplenium Trichomanes ramosum"" are to be treated as orthographic errors – in this case, for ""Asplenium ramosum"". That name was later rejected in favour of William Hudson's later