Thelypteris palustris

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File:Therypteris palustris.JPG A swamp is a wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions. Swamps usually are regarded as including a large amount of woody vegetation. When a wetland area does not, it is usually termed a marsh.

Swamps are generally characterized by very slow-moving waters, often rich in tannins from decaying vegetation. They are usually associated with adjacent rivers or lakes. In some cases, rivers become swamps for a distance. Swamps are features of areas with very low topographic relief, although they may be surrounded by mountains.

The most famous swamps in the United States are the Okefenokee Swamp (home to the cartoon characters of Pogo, by Walt Kelly) and the Great Dismal Swamp. The Okefenokee is located in extreme southeastern Georgia and extends slightly into northeastern Florida. The Great Dismal Swamp lies in extreme southeastern Virginia and extreme northeastern North Carolina. Both are National Wildlife Refuges. Another swamp area, Reelfoot Lake of extreme western Tennessee, was created by the New Madrid earthquake of 1812. Caddo Lake, the Great Dismal and Reelfoot are swamps that are centered around large lakes. Swamps are often called bayous in the southeastern United States.

Swamps are characterized by rich biodiversity and specialized organisms. For instance, southeastern U.S. swamps, such as those mentioned above, feature trees such as the Bald cypress and Water tupelo, which are adapted to growing in standing water, and animals such as the American alligator.

A common species name in biological nomenclature is the Latin palustris, meaning "of the swamp". Examples of this are Quercus palustris (pin oak) and Thelypteris palustris (marsh fern).



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Plant in Armenia

Թելիպտեր ճահճային (“Telipter chahchayin”)

Status

This rare marsh fern was gathered in Armenia only once in 1940’s. Though there are some other lakes around the only population of this fern, it does not spread to those ones.

Habitat in Armenia

Met only in the Dareleghis floristic region of Armenia.

Habitat and ecology

In humid, often marsh places, around lakes.

Biology and potential value

Found only in South Caucasus, this fern has significant scientific value.

Measures of protection

Disappearing species. In the result of intensive search of this species around Martiros village, this fern was rediscovered. A reserve around Martiros village should be developed.

External links

http://en.wikipedia.org/wiki/Swamp