Asplenium viride
Encyclopedia
Asplenium viride is known as the green spleenwort because of its green stipes
Stipe (botany)
In botany, a stipe is a stalk that supports some other structure. The precise meaning is different depending on which taxonomic group is being described....

 and raches
Rachis
Rachis is a biological term for a main axis or "shaft".-In zoology:In vertebrates a rachis can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the rachis usually form the supporting axis of the body and is then called the spine or vertebral column...

. This feature easily distinguishes this species from the very similar-looking maidenhair spleenwort, Asplenium trichomanes
Asplenium trichomanes
Asplenium trichomanes is a small fern in the spleenwort genus Asplenium. It is a widespread and common species, occurring almost worldwide in a variety of rocky habitats. It is a variable fern with several subspecies.-Description:It grows in tufts from a short rhizome...

.

Nomenclature

Green spleenwort was described by Carl Linnaeus in his 1753 Species Plantarum
Species Plantarum
Species Plantarum was first published in 1753, as a two-volume work by Carl Linnaeus. Its prime importance is perhaps that it is the primary starting point of plant nomenclature as it exists today. This means that the first names to be considered validly published in botany are those that appear...

, under the name "Asplenium Trich. ramosum", with a type locality of "" (rocks in Caernarfonshire
Caernarfonshire
Caernarfonshire , historically spelled as Caernarvonshire or Carnarvonshire in English during its existence, was one of the thirteen historic counties, a vice-county and a former administrative county of Wales....

). 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
William Hudson (botanist)
William Hudson FRS was a British botanist and apothecary based in London. His main work was Flora Anglica, published in 1762. He was elected a fellow of the Royal Society in 1761.- Life and work :...

's later name Asplenium viride, which had a type locality of "" (damp rocks in the mountains of Wales, Yorkshire
Yorkshire
Yorkshire is a historic county of northern England and the largest in the United Kingdom. Because of its great size in comparison to other English counties, functions have been increasingly undertaken over time by its subdivisions, which have also been subject to periodic reform...

 and Westmorland
Westmorland
Westmorland is an area of North West England and one of the 39 historic counties of England. It formed an administrative county from 1889 to 1974, after which the entirety of the county was absorbed into the new county of Cumbria.-Early history:...

).

Ecology

A. viride is a native species of northern and western North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 and northern Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 and Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

. It is a small rock fern, growing on calcareous
Calcareous
Calcareous is an adjective meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.-In zoology:...

 rock. It is a diploid species, with n = 36, and hybridizes with Asplenium trichomanes
Asplenium trichomanes
Asplenium trichomanes is a small fern in the spleenwort genus Asplenium. It is a widespread and common species, occurring almost worldwide in a variety of rocky habitats. It is a variable fern with several subspecies.-Description:It grows in tufts from a short rhizome...

to produce Asplenium × adulterinum, found on Vancouver Island
Vancouver Island
Vancouver Island is a large island in British Columbia, Canada. It is one of several North American locations named after George Vancouver, the British Royal Navy officer who explored the Pacific Northwest coast of North America between 1791 and 1794...

, British Columbia
British Columbia
British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...

.

External links

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