''Scheuchzeria palustris'' (Rannoch-rush, or pod grass), is a

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Scheuchzeriaceae, in which there is only one species and ''Scheuchzeria'' is the only genus. In the

APG II system The APG II system (Angiosperm Phylogeny Group II system) of plant classification is the second, now obsolete, version of a modern, mostly Molecular phylogenetics, molecular-based, list of systems of plant taxonomy, system of plant taxonomy that ...

it is placed in the order

Alismatales The Alismatales (alismatids) are an order of flowering plants including about 4,500 species. Plants assigned to this order are mostly tropical or aquatic. Some grow in fresh water, some in marine habitats. Perhaps the most important food cro ...

of the

monocots Monocotyledons (), commonly referred to as monocots, ( Lilianae '' sensu'' Chase & Reveal) are flowering plants whose seeds contain only one embryonic leaf, or cotyledon. A monocot taxon has been in use for several decades, but with various ranks a ...

.L. Watson and M. J. Dallwitz (1992 onwards). The families of flowering plants
Scheuchzeriaceae
/ref>

Description

It is a

herbaceous Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition of ...

perennial plant In horticulture, the term perennial (''wikt:per-#Prefix, per-'' + ''wikt:-ennial#Suffix, -ennial'', "through the year") is used to differentiate a plant from shorter-lived annual plant, annuals and biennial plant, biennials. It has thus been d ...

, native to cool temperate regions of the

Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined by humans as being in the same celestial sphere, celestial hemisphere relative to the invariable plane of the Solar ...

, where it grows in wet ''

Sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, also bog moss and quacker moss (although that term is also sometimes used for peat). Accumulations of ''Sphagnum'' can store water, since ...

peat bog A bog or bogland is a wetland that accumulates peat as a deposit of dead plant materials often mosses, typically sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, mosses, quagmire, and muske ...

s. It grows to 10–40 cm tall, with narrow linear

leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...

alternating up the stem, with a basal sheath. The leaves can be up to 20 cm. The leaf tips are blunt with a conspicuous pore. It has a creeping

rhizome In botany and dendrology, a rhizome ( ) is a modified subterranean plant stem that sends out roots and Shoot (botany), shoots from its Node (botany), nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from ...

clothed in papery, straw coloured remains of old leaf bases. The

flower Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...

s are greenish-yellow, 4–6 mm diameter, with six

tepal A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...

s. They have an inflated sheathing base, 6

stamens The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filamen ...

and 3 carpels. It flowers from June until AugustFlora of NW Europe
''Scheuchzeria palustris''
/ref>Flora of North America
''Scheuchzeria palustris''
/ref>Jepson Flora Project
''Scheuchzeria palustris''
/ref> There are two

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

, not considered distinct by all authorities:USDA Plants Profile
''Scheuchzeria palustris''
/ref> *''Scheuchzeria palustris'' subsp. ''palustris''. Northern and eastern

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

, northern

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

. *''Scheuchzeria palustris'' subsp. ''americana'' (Fernald) Hultén. Northern

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

Etymology

The genus is named after Johann Jakob Scheuchzer, a

Swiss Swiss most commonly refers to: * the adjectival form of Switzerland * Swiss people Swiss may also refer to: Places * Swiss, Missouri * Swiss, North Carolina * Swiss, West Virginia * Swiss, Wisconsin Other uses * Swiss Café, an old café located ...

naturalist, and his brother, Johann Gaspar Scheuchzer.Helmut Genaust (1983): Etymologisches Wörterbuch der botanischen Pflanzennamen, 2. Auflage. Birkhäuser Verlag - The species name is from the Latin for a

swamp A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Swamps are considered to be transition zones because both land and water play a role in ...

. The English name refers to its occurrence on

Rannoch Moor Rannoch Moor (; ) is an expanse of around of boggy moorland to the west of Loch Rannoch in Scotland, from where it extends into westerly Perth and Kinross, northerly Lochaber (in Scottish Highlands, Highland), and the area of Highland Scotland ...

in central

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

, the first site in

Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...

the species was known from, and only one where it currently occurs; it is

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

at a few other wetland sites further south in Britain, being found in pools and wet hollows of ancient undisturbed

bogs.Joint Nature Conservation Committe
Rannoch Moor
/ref>Wildassociates

File:ScheuchzeriaPalustris.jpg, Flowering plant Image:ScheuchzeriaPalustrisColl.jpg, Stem with seeds, left; winter stem, right Image:Scheuchzeria palustris Sturm3.jpg, 1796 illustration

References

External links

{{Taxonbar, from=Q13829686, from2= Q10542762, from3=Q156984 Monotypic Alismatales genera Taxa described in 1753 Taxa named by Carl Linnaeus