|name_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|name_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|habit=grass
|habit=grass
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|usda_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|usda_ref=Flora - A Gardener's Encyclopedia ISBN 0881925381
|max_zone=5
|max_zone=5
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|image=Upload.png
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|image=Liesgras planten Glyceria maxima.jpg
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|image_width=240
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|image_width=200
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|image_caption=Reed Mannagrass
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}}
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Describe the plant here...
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'''''Glyceria maxima''''' (Hartm.) Holmb. (syn. ''G. aquatica'' (L.) Wahlenb.; ''G. spectabilis'' Mert. & W.D.J. Koch; ''Molinia maxima'' Hartm.; ''Poa aquatica'' L.; '''Reed Mannagrass'''; '''Reed Sweetgrass''') is a species of [[rhizome|rhizomatous]] perennial grasses in the [[Glyceria|mannagrass]] genus native to [[Europe]] and [[Western Siberia]] and growing in wet areas such as riverbanks and ponds. It is highly competitive and invasive and is often considered noxious weed outside its native range.