Poaceae
Water mannagrass
Glyceria fluitans
- Family
- Poaceae
- Genus
- Glyceria
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Common names
By language (23)
- arz
- فلويتان الجلسريا
- Belarusian
- Маннік наплываючы, Манна
- Bulgarian
- Речна росица
- Catalan
- Glycérie Flottante
- Croatian
- Potočna pirevina
- Czech
- Zblochan vzplývavý
- Danish
- Manna-Sødgræs
- Dutch
- Mannagras
- English
- Water mannagrass, Floating sweet-grass, Flote-grass, floating sweet-grass, Flottin sweet grass, Sweet grass, Water manna grass
- Estonian
- Harilik parthein
- Finnish
- Ojasorsimo
- French
- Glycérie flottante, Glycérie Flottante, Glycérie Flottante
- German
- Flutender Schwaden, Flutendes Süssgras, Entengras, Glycérie Flottante, Grütz-Schwaden, Manna-Schwaden
- hsb
- Słódka porčizna
- Irish
- Milseán uisce
- Korean
- 뜬미꾸리광이
- Latvian
- Peldošā ūdenszāle
- Lithuanian
- Paprastoji monažolė, Glycérie Flottante
- Norwegian Bokmål
- Mannasøtgras
- Polish
- Manna jadalna
- Russian
- Манник наплывающий
- Swedish
- Mannagräs, Glycérie Flottante
- Welsh
- Melyswellt arnofiol
Synonyms
- Desvauxia fluitans P.Beauv. ex Kunth
- Festuca fluitans L.
- Festucaria heisteri Fabr. ex Steud.
- Glyceria acuminata Schur
- Glyceria denticulata Dumort.
- Glyceria fluitans var. acutiflora Döll
- Glyceria fluitans var. adscendens Wahlenb.
- Glyceria fluitans var. denticulata Dumort.
- Glyceria fluitans var. festucacea Fr.
- Glyceria fluitans var. inflata H.Post
- Glyceria fluitans var. integra Dumort.
- Glyceria fluitans var. islandica Á.Löve
- Glyceria fluitans var. maritima Gray
- Glyceria fluitans var. terrestris Gray
- Glyceria fluitans var. triticea (Fr.) Andersson
- Glyceria fluitans var. vivipara Gray
- Glyceria integra Dumort.
- Hydrochloa fluitans (L.) Hartm.
- Melica fluitans (L.) Raspail
- Molinia fluitans (L.) Hartm.
- Molinia plicata Hartm.
- Panicularia brachyphylla Nash
- Panicularia fluitans (L.) Kuntze
- Poa barrelieri Biv.
- Poa fluitans (L.) Scop.
Flowers
- In flower
- May to August (from 45 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Graminoid
- Lifespan
- Perennial
- In the US and Canada
- Canada: introduced, Hawaii: introduced, Lower 48 states: introduced, St. Pierre and Miquelon: introduced
Photos
FlowerPhoto: Joe Dillon, CC BY 4.0, from iNaturalist 
FlowerPhoto: Joe Dillon, CC BY 4.0, from iNaturalist 
FlowerPhoto: Fyodor Pudovikov, CC BY 4.0, from iNaturalist 
FlowerPhoto: Fyodor Pudovikov, CC BY 4.0, from iNaturalist 
Photo: James K. Lindsey, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Robert H. Wardell, CC0, from iNaturalist 
Photo: Kristian Peters -- Fabelfroh 13:21, 27 January 2006, CC BY-SA 3.0, from Wikimedia Commons 
Photo: pete_gateley, CC0, from iNaturalist 
Photo: Stefan.lefnaer, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Stanislav Murashkin, CC BY 4.0, from iNaturalist 
Photo: Stefan.lefnaer, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Patrick Le Mao, CC0, from iNaturalist
More in Glyceria
- Reed mannagrassGlyceria maximaPoaceae
- Glyceria lithuanicaPoaceae
- Plicate sweet-grassGlyceria notataPoaceae
- Waxy mannagrassGlyceria declinataPoaceae
- Fowl manna grassGlyceria striataPoaceae
- Rattlesnake manna grassGlyceria canadensisPoaceae
- Glyceria nemoralisPoaceae
- American mannagrassGlyceria grandisPoaceae
- Creeping mannagrassGlyceria acutifloraPoaceae
- Northern manna grassGlyceria borealisPoaceae
- Glyceria ischyroneuraPoaceae
- Davy mannagrassGlyceria leptostachyaPoaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.