Species Details

Glyceria grandis

American manna grass

  Download Report   Calflora     eFlora     CCH     CalPhotos
Photo of Glyceria grandis
©2004 Dean Wm. Taylor
Scientific Name:
Glyceria grandis Wats.
Common Name:
American manna grass
Family: Poaceae
Element Code: PMPOA2Y080
USDA Plants Symbol: GLGR
Synonyms/Other Names:
CA Rare Plant Rank: 2B.3
Fed List: None
State List: None
Global Rank: G5
State Rank:
Other Status:
CRPR Changes:
changed from 2.3 to 2B.3 on 2013-06-12
Add Date: 1974-01-01
Date Edited: 2021-05-26
Lifeform: perennial rhizomatous herb
Blooming Period: Jun-Aug
15 - 1980 meters
50 - 6495 feet
General Habitat:
  • Bogs and fens
  • Meadows and seeps
  • Marshes and swamps (lake margins, streambanks)
General Micro Habitat:
Micro Habitat:
Total Occurrences: 10
Element Occurrence Ranks:
0 0 1 0 0 9
Occurrence Status:
Historical >20 Years 9
Recent <=20 Years 1
Presumed Extant 10
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Alaska (AK), Arizona (AZ), California (CA), Colorado (CO), Connecticut (CT), Delaware (DE), Idaho (ID), Illinois (IL), Indiana (IN), Iowa (IA), Maine (ME), Maryland (MD), Massachusetts (MA), Michigan (MI), Minnesota (MN), Mississippi (MS), Montana (MT), Nebraska (NE), Nevada (NV), New Hampshire (NH), New Jersey (NJ), New Mexico (NM), New York (NY), North Carolina (NC), North Dakota (ND), Ohio (OH), Oregon (OR), Pennsylvania (PA), Rhode Island (RI), South Dakota (SD), Tennessee (TN), Utah (UT), Vermont (VT), Virginia (VA), Washington (WA), West Virginia (WV), Wisconsin (WI), Wyoming (WY)
California Counties and Islands: Name (Code)
El Dorado (ELD), Fresno (FRE), Humboldt (HUM), Mendocino (MEN), Mono (MNO), Placer (PLA), Tulare (TUL)
Quads: Name (Quad Code)
Big Alkali (3811922), Bridgeport (3811932), Coleville (3811955), Emerald Bay (3812081), Eureka Hill (3812385), General Grant Grove (3611868), Leech Lake Mtn. (3912381), Loon Lake (3812083), Luckett Mtn. (3611972), Maple Creek (4012377), Miramonte (3611961), Patterson Mtn. (3611981), Point Arena (3812386), Sacate Ridge (3611982), Shadequarter Mtn. (3611858), Tahoe City (3912022), The Sphinx (3611875), Tucker Mtn. (3611962), Verplank Ridge (3611971)
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.


Presumed Extant
Counties   Quads