Northern mannagrass
Glyceria borealis · Aquatic plants
A stand of it · Photo: Allan Harris / CC0
Also called Floating mannagrass, Small floating mannagrass
How to identify Northern mannagrass
- Long narrow leaves that often float on the water
- Narrow, upright seed heads with long spikelets
- Closed leaf sheaths
- Stems often lean into the water
Similar plants
Western mannagrass is very similar; floating leaves of shortawn foxtail are shorter.
Growth profile
| Growing season | Grows from spring, flowers July and August. |
|---|---|
| Starts growing | About 45 to 50 F water |
| Light | Full sun |
| Depth | Shoreline to about 2 feet of water |
| How it spreads | Rhizomes, rooting stems and seeds |
| Habitat | Shallow ponds, lake margins and slow streams. |
Why it matters in a lake
Leaves floating on the surface can be mistaken for pondweeds.
Where it is found
- Idaho: Occasional
- Oregon: Occasional
- Wyoming: Occasional
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Poales |
| Family | Poaceae |
| Scientific name | Glyceria borealis |
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Baltic rushNeed a hand?
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