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Glyceria grandis
Glyceria grandis S. Watson
American Mannagrass, American Manna Grass, Tall Manna Grass, Reed Meadowgrass
Poaceae (Grass Family)
Synonym(s):
USDA Symbol: GLGR
USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)
American manna grass is a perennial grass which spreads by both thick rhizomes and stolons. Thick, stout, culms are 2-6 ft. tall and sometimes decumbent at the base. The large, showy, openly branched, purplish panicle is up to 16 in. long and nods at the summit.
Cool-season grass has broad, pale leaves and very loose, open flowering stalks. Important member of wetland communities. (Ontario Native Plants 2002)
From the Image Gallery
Plant Characteristics
Duration: PerennialHabit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Venation: Parallel
Fruit Type: Caryopsis
Size Notes: Up to about 6 feet tall.
Bloom Information
Bloom Color: PurpleBloom Time: May , Jun , Jul , Aug
Distribution
USA: AK , AZ , CA , CO , CT , IA , ID , IL , IN , MA , MD , ME , MI , MN , MS , MT , ND , NE , NH , NJ , NM , NV , NY , OH , OR , PA , RI , SD , TN , UT , VA , VT , WA , WI , WV , WYCanada: NB , NL , NS , ON , PE , QC
Native Distribution: Canada, s. to VA, TN mts., n. IL, NE, NM, AZ & CA
Native Habitat: Stream banks; non-tidal marshes; lake margins
Growing Conditions
Light Requirement: SunSoil Moisture: Wet
Soil Description: Wet soils.
Conditions Comments: A rapidly growing grass.
Propagation
Commercially Avail: yesFind Seed or Plants
Find seed sources for this species at the Native Seed Network.
National Wetland Indicator Status
Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
Status: | OBL | OBL | OBL | OBL | OBL | OBL | OBL | OBL |
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:North American Native Plant Society - Etobicoke, ON
Native Seed Network - Corvallis, OR
Bibliography
Bibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.Search More Titles in Bibliography
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Glyceria grandis in USDA PlantsFNA: Find Glyceria grandis in the Flora of North America (if available)
Google: Search Google for Glyceria grandis
Metadata
Record Modified: 2023-01-25Research By: TWC Staff