Taxon Report
Glyceria grandis Wats.American manna grass |
 ©2004 Dean Wm. Taylor |
Taxon Summary
Glyceria grandis, commonly known as American manna grass, is a perennial rhizomatous herb in the Poaceae that is found in California and elsewhere. It occurs within Bogs and fens, Marshes and swamps (lake margins, streambanks), and Meadows and seeps, growing at elevations from 15 to 1980 meters. Glyceria grandis is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.Classification
|
Scientific Name: |
Glyceria grandis Wats. |
|
Common Name: |
American manna grass |
| Family: | Poaceae |
| Element Code: | PMPOA2Y080 |
| USDA Plants Symbol: | GLGR |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: Jun-Aug | Jun-Aug |
| Elevation: | 15-1980 (50-6495) |
| General Habitats: | Bogs and fens, Marshes and swamps, Meadows and seeps |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.3 |
| Global Rank: | G5 |
|
State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 10 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 9 |
| California Endemic: False | |
| 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), 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) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 10 % | |
| Grazing | 1 | 10% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 February 2025].