Largeleaf pondweed
Potamogeton amplifolius · Aquatic plants
Out of the water · Photo: Owen McElroy / CC0
Also called Broadleaf pondweed, Bass weed
How to identify Largeleaf pondweed
- Broad, arched submersed leaves up to 3 inches wide with many veins
- Leaves often folded along the midrib
- Oval floating leaves on long stalks
Similar plants
Illinois pondweed has narrower, flatter leaves; American pondweed has narrow submersed leaves.
Growth profile
| Growing season | Grows from rhizomes in late spring, peaks in midsummer and dies back in fall. |
|---|---|
| Starts growing | About 50 to 55 F water |
| Light | Needs fairly clear water |
| Depth | 3 to 15 feet |
| How it spreads | Rhizomes and seeds |
| Habitat | Clear lakes with soft mud bottoms, often in deeper water. |
Why it matters in a lake
Called bass weed for the shade and cover it gives fish. Sensitive to murky water, so declines as clarity drops.
Where it is found
- Idaho: Occasional
- Oregon: Occasional
- Wyoming: Rare
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Alismatales |
| Family | Potamogetonaceae |
| Scientific name | Potamogeton amplifolius |
Eurasian watermilfoil
Curly leaf pondweed
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Coontail
Elodea
Sago pondweed
Leafy pondweed
Common bladderwort
White water buttercup
Slender naiadNeed a hand?
Is it taking over your lake?
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