Western mannagrass
Glyceria occidentalis · Aquatic plants
Photo: Drew Meyer / CC0
How to identify Western mannagrass
- Leaves floating or lying on the water
- Narrow seed heads with long spikelets
- Closed leaf sheaths
- Stems root at the nodes
Similar plants
Northern mannagrass is nearly identical and separated by flower details.
Growth profile
| Growing season | Grows from spring, flowers in summer. |
|---|---|
| Starts growing | About 45 to 50 F water |
| Light | Full sun |
| Depth | Shoreline to about 2 feet of water |
| How it spreads | Rooting stems and seeds |
| Habitat | Shallow ponds, ditches and lake margins. |
Why it matters in a lake
Mostly in western valleys.
Where it is found
- Idaho: Occasional
- Oregon: Occasional
- Wyoming: Not recorded
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Poales |
| Family | Poaceae |
| Scientific name | Glyceria occidentalis |
Broadleaf cattail
Hardstem bulrush
Reed canarygrass
Purple loosestrife
Soft rush
Yellow flag iris
Broadleaf arrowhead
Western water hemlock
Beaked sedge
Baltic rushNeed a hand?
Is it taking over your lake?
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