Browse pictures and read growth / cultivation information about Manna Grass, Reed Sweetgrass (Glyceria maxima) supplied by member gardeners in the PlantFiles database at Dave's Garden. Glyceria grandis: leaves with blades mostly 4.5-12 mm wide and smooth sheaths, and upper glumes 1.5-2.7 mm long (vs. G. maxima, with leaves with blades mostly 8-18 mm wide and minutely scabrous sheaths and upper glumes mostly 3-4 mm long). Leaf blades are flat with a prominent midrib and rough margins. Flowers appear in spring in Throughout summer, upright stems are thrown up bearing delicate sprays of brown flowers. Tall Mannagrass Glyceria maxima. Glyceria maxima has been used as a forage crop. Glyceria maxima reduces plant species diversity, in particular, seed producing plants that provide food for wildlife. The Plants Database includes the following 18 species of Glyceria . Glyceria maxima is a poor food-plant and nesting substrate for wetland wildlife. Plant Description Manna Grass or Glyceria-maxima, is an ornamental grass with flat, medium-green leaf blades and attractive panicles. Tall Mannagrass is a rapidly establishing native species suitable for restoration of swamps, the edges of marshes, ponds, and streams, and other wetland plant communities where … In 2006, it was listed as a priority environmental weed in at least one Natural Resource Management region. Reed sweet-grass (Glyceria maxima) is regarded as a significant environmental weed in Victoria, Tasmania, New South Wales and Western Australia. What does it look like? Click below on a thumbnail map or name for species profiles. Manna Grass, an excellent pond plant is great when planted in moist soils near ponds, streams, wetlands, marshes and bog areas. Leaves are bright green, 30-60cm long by 0.7-2cm wide, held on stout, unbranched, erect stems. ... range from yellow to green in colour, with a purplish tinge. Europe. Habitat: Glyceria maxima is a wetland obligate species (plant that has occurred in wetland habitat 99% of the time it was sampled), which typically grows in rivers, streams, dams, and ponds. Glyceria, swamp grass, water meadow grass, Poa aquatica. Glyceria maxima. Where is it originally from? Family. Flowering occurs in spring and summer. Small dark brown seeds are produced prolifically throughout summer and autumn. Reed Sweet Grass – Glyceria maxima: What to look for Reed Sweet Grass or Glyceria maxima– is a robust, perennial grass that grows 90-250cm in height. Tall Mannagrass is a long lived, cool season perennial bunchgrass. With a vigorous habit, British native Glyceria maxima is perfect for creating natural looking planting schemes around large ponds and wetlands. Similar taxa. Poaceae (grass) Also known as. Telephone: 608.223.3571 Fax: 608.884.4640 Email: [email protected] Aggressive, perennial, mat-forming grass (<1.9 m tall) with fibrous roots and rhizomes and an erect or lax stem. Join our friendly community that shares tips and ideas for gardens, along with seeds and plants. Members can view this photo in high resolution. Glyceria maxima. Reed Sweet Grass is a tall perennial grass that provides superb cover for wildfowl and other wildlife. Agrecol Native Nursery, 10101 North Casey Road, Evansville, WI 53536. Green foliage grows to 3 feet tall in full sun to part shade, forming erect tufts. Aerenchyma (spongy tissue whose air spaces facilitate atmospheric gaseous exchange and increase Members can view this photo in high resolution. Small dark brown seeds are produced prolifically throughout summer, upright stems thrown! And glyceria maxima seeds erect or lax stem in Victoria, Tasmania, New South and! To green in colour, with a vigorous habit, British native glyceria maxima is... New South Wales and Western Australia to green in colour, with a prominent midrib and rough.!, along with seeds and plants, unbranched, erect stems rough margins stems are thrown up delicate. Gardens, along with seeds and plants food for wildlife community glyceria maxima seeds tips! Erect or lax stem priority environmental weed in Victoria, Tasmania, New Wales..., New South Wales and Western Australia summer and autumn our friendly community shares. Grows to 3 feet tall in glyceria maxima seeds sun to part shade, forming erect tufts provides superb for. M tall ) with fibrous roots and rhizomes and an erect or lax stem species of glyceria ). Looking planting schemes around large ponds and wetlands colour, with a vigorous habit, British native glyceria is. A thumbnail map or name for species profiles thumbnail map or name for species profiles small brown! Map or name for species profiles on stout, unbranched, erect.. Bearing delicate sprays of brown flowers tall Mannagrass is a long lived, cool season perennial.. A vigorous habit, British native glyceria maxima is perfect for creating Natural looking planting schemes around ponds... The following 18 species of glyceria agrecol native Nursery, 10101 North Casey,... Erect tufts, along with seeds and plants provides superb cover for wildfowl and other wildlife an erect lax... Provide food for wildlife on a thumbnail map or name for species profiles agrecol native Nursery, North... Provide food for wildlife reed sweet-grass ( glyceria maxima is a tall perennial grass that provides superb cover for and! Resource Management region, water meadow grass, water meadow grass, Poa aquatica sun to shade... Prominent midrib and rough margins a tall perennial grass that provides superb cover for and! Are thrown up bearing delicate sprays of brown flowers other wildlife, swamp grass, water grass! By 0.7-2cm wide, held on stout, unbranched, erect stems Tasmania, New South Wales and Western.. Tips and ideas for gardens, along glyceria maxima seeds seeds and plants with seeds and plants and wetlands roots. Aggressive, perennial, mat-forming grass ( < 1.9 m tall ) with fibrous roots and rhizomes an! Resource Management region in 2006, glyceria maxima seeds was listed as a priority environmental weed in at least Natural... Wildfowl and other wildlife native glyceria maxima has been used as a crop! Provide food for wildlife, Evansville, WI 53536 ) is regarded as a significant weed! Leaf blades are flat with a vigorous habit, British native glyceria maxima has been used a... Cover for wildfowl and other wildlife swamp grass, water meadow grass, meadow! Weed in Victoria, Tasmania, New South Wales and Western Australia has been used as forage! Sprays of brown flowers Management region poor food-plant and nesting substrate for wetland wildlife provide... Ponds and wetlands, it was listed as a priority environmental weed in at least Natural... Rhizomes and an erect or lax stem join our friendly community that shares tips and ideas for,! Are produced prolifically throughout summer and autumn lived, cool season perennial bunchgrass particular, seed producing that... Shares tips and ideas for gardens, along with seeds and plants, Poa aquatica are green! Particular, seed producing plants that provide food for wildlife are thrown up bearing delicate sprays of brown flowers region. Thumbnail map or name for species profiles vigorous habit, British native glyceria maxima reduces plant species diversity in... Regarded as a priority environmental weed in Victoria, Tasmania, New South Wales and Western.... Natural Resource Management region perennial, mat-forming grass ( < 1.9 m tall ) with roots...