''Glyceria'' is a widespread genus of

grass family Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns and ...

common across

Eurasia Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago a ...

, Australia,

North Africa North Africa, or Northern Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, and it is sometimes defined as stretching from the Atlantic shores of Mauritania in ...

, and the

Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous grasses found in wet areas in temperate regions worldwide. The base of the grass grows along the ground and may root at several places. Then it grows erect and bears leaf blades which may be flat or folded. The

panicle A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...

inflorescences nod when heavy. Some mannagrasses are considered weeds while others are endangered in their native habitats.Whipple, I. G. et al. (2007)
Molecular insights into the taxonomy of ''Glyceria'' (Poaceae: Meliceae) in North America.
American Journal of Botany 94(4) 551-57.Rodionov, A. V., et al. (2013)
Variability of the ITS1-5.8 S rDNA-ITS2 sequence during the divergence of sweet-grass species (''Glyceria'' R.Br.).
Russian Journal of Genetics: Applied Research 3(2) 83-90. ; Species * ''

Glyceria acutiflora ''Glyceria acutiflora'', the creeping mannagrass, is a perennial grass found in the north-eastern United States and in north-eastern Asia. Its specific epithet ''acutiflora'' means "acute-flowered". It has a diploid number of 40. Description '' ...

'' - creeping mannagrass - China, Korea, Japan, northeastern + east-central USA * ''

Glyceria alnasteretum ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Alaska,Tzvelev, N. N. 2006. Synopsis of the mannagrass ''Glyceria'' (Poaceae). Botaničeskii Žhurnal (Moscow & Leningrad) 91(2): 255–276 Russian Far East, Japan, Korea * ''

Glyceria × amurensis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Amur Oblast * ''

Glyceria arkansana ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatou ...

'' - Arkansas mannagrass - south-central USA * ''

Glyceria arundinacea ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Eurasia from Hungary to Korea * ''

Glyceria australis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Australian sweetgrass - Australia * ''

Glyceria borealis ''Glyceria borealis'' is a species of ''Glyceria'' known by the common names northern mannagrass, boreal mannagrass, and small floating mannagrass. It is native to much of the northern half of North America, where it has a widespread distribution ...

'' - northern mannagrass - western, north-central, + northeastern USA incl Alaska; Canada incl Yukon + Northwest Territories; Mexico (

Chihuahua Chihuahua may refer to: Places *Chihuahua (state), a Mexican state **Chihuahua (dog), a breed of dog named after the state **Chihuahua cheese, a type of cheese originating in the state **Chihuahua City, the capital city of the state **Chihuahua Mun ...

) * ''

Glyceria canadensis ''Glyceria canadensis'' is a species of grass in the genus ''Glyceria'' which is known by the common name rattlesnake mannagrass. It is native to North America, from British Columbia to Newfoundland and south to North Carolina. It is commonly f ...

'' - rattlesnake mannagrass, Canadian mannagrass - Canada; USA (Northeast, Great Lakes, Oregon, Washington) * ''

Glyceria caspia ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' -

Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...

* ''

Glyceria chinensis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - China (

Yunnan Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is ...

Guizhou Guizhou (; formerly Kweichow) is a landlocked province in the southwest region of the People's Republic of China. Its capital and largest city is Guiyang, in the center of the province. Guizhou borders the autonomous region of Guangxi to t ...

) * ''

Glyceria colombiana ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Colombia * ''

Glyceria declinata ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - waxy mannagrass, low glyceria, small sweet-grass - Europe, Morocco,

Madeira ) , anthem = ( en, "Anthem of the Autonomous Region of Madeira") , song_type = Regional anthem , image_map=EU-Portugal_with_Madeira_circled.svg , map_alt=Location of Madeira , map_caption=Location of Madeira , subdivision_type=Sovereign st ...

Azores ) , motto =( en, "Rather die free than subjected in peace") , anthem= ( en, "Anthem of the Azores") , image_map=Locator_map_of_Azores_in_EU.svg , map_alt=Location of the Azores within the European Union , map_caption=Location of the Azores wi ...

, Canary Islands; naturalized in scattered locales in North America * ''

Glyceria depauperata ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Japan,

Kuril Islands The Kuril Islands or Kurile Islands (; rus, Кури́льские острова́, r=Kuril'skiye ostrova, p=kʊˈrʲilʲskʲɪjə ɐstrɐˈva; Japanese: or ) are a volcanic archipelago currently administered as part of Sakhalin Oblast in the ...

* ''

Glyceria × digenea ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - France, Czech Republic * '' Glyceria drummondii'' - Western Australia * ''

Glyceria elata ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - tall mannagrass - western USA, British Columbia, Alberta * ''

Glyceria fluitans ''Glyceria fluitans'' ( syns ''Festuca fluitans'', ''Poa fluitans'', ''Panicularia fluitans''), known as floating sweet-grass and water mannagrass, is a species of perennial grass in the genus ''Glyceria'' native to Europe, the Mediterranean re ...

'' - water mannagrass, floating sweet-grass - Morocco; Eurasia from Iceland + Portugal to Turkmenistan * ''

Glyceria × gatineauensis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Québec, New York, West Virginia * '' Glyceria grandis'' - American mannagrass - USA incl Alaska; Canada incl Yukon + Northwest Territories * ''

Glyceria insularis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' -

Tristan da Cunha Tristan da Cunha (), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately from Cape Town in South Africa, from Saint Helena ...

* ''

Glyceria ischyroneura ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Japan,

, Korea * ''

Glyceria latispicea ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' -

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

* ''

Glyceria leptolepis ''Glyceria'' is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas. ''Glyceria'' is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous ...

'' - Russian Far East, China incl Taiwan, Korea, Japan * '' Glyceria leptorhiza'' - Korea,

Honshu , historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island separ ...

Hokkaido is Japan's second largest island and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel. The la ...

Heilongjiang Heilongjiang () formerly romanized as Heilungkiang, is a province in northeast China. The standard one-character abbreviation for the province is (). It was formerly romanized as "Heilungkiang". It is the northernmost and easternmost province ...

, Amur Oblast, Khabarovsk, Zabaykalsky Krai * ''Glyceria leptostachya'' - davy mannagrass, narrow mannagrass - California, Oregon, Washington, British Columbia, Alaska * ''Glyceria lithuanica'' - Lithuanian mannagrass - northern Eurasia from Norway to Korea * ''Glyceria maxima'' - reed mannagrass, English watergrass, reed sweet-grass - Eurasia from Ireland to Xinjiang * ''Glyceria melicaria'' - melic mannagrass - eastern North America * ''Glyceria multiflora'' - Chile, Argentina, Uruguay, Rio Grande do Sul, Santa Catarina (state), Santa Catarina * ''Glyceria nemoralis'' - Caucasus, central + eastern Europe * ''Glyceria notata'' - marked glyceria, plicate sweet-grass - Eurasia + North Africa from Denmark + Morocco to Xinjiang * ''Glyceria nubigena'' - Great Smoky Mountain mannagrass - Great Smoky Mountains of North Carolina + Tennessee * ''Glyceria obtusa'' - Atlantic mannagrass - eastern North America * ''Glyceria occidentalis'' - northwestern mannagrass - California, Oregon, Washington, British Columbia, Idaho, Nevada * ''Glyceria × ottawensis'' - Ontario * ''Glyceria × pedicellata'' - northern + central Europe * ''Glyceria pulchella'' - MacKenzie Valley mannagrass, beautiful glyceria - Alaska, western Canada incl Yukon + Northwest Territories * ''Glyceria saltensis'' - Salta Province in Argentina * ''Glyceria septentrionalis'' - floating mannagrass - eastern USA, eastern Canada, northeastern Mexico * ''Glyceria spicata'' - India, Mediterranean * ''Glyceria spiculosa'' - eastern Russia, northern China, Korea * ''Glyceria striata'' - fowl mannagrass, ridged glyceria - Canada incl Arctic Territories, USA incl Alaska, Mexico, Guatemala * ''Glyceria × tokitana'' Masamura - Japan * ''Glyceria tonglensis'' C.B.Clarke - Himalayas, China incl Tibet ; formerly included Numerous species now considered better suited to other genera: ''Arctophila (plant), Arctophila Catabrosa Colpodium Dryopoa Eragrostis Hydrocotyle Melica Phippsia Poa Puccinellia Scolochloa Torreyochloa Triplasis''

References

{{Taxonbar, from=Q157515 Glyceria, Poaceae genera Grasses of Africa Grasses of Asia Grasses of Europe Grasses of North America Grasses of Oceania Grasses of South America