Robbins' pondweed
Potamogeton robbinsii · Aquatic plants
Out of the water · Photo: Bex Goreham / CC BY
Also called Fern pondweed
How to identify Robbins' pondweed
- Leaves in two neat rows like a fern frond
- Leaf bases have earlike lobes and fibrous sheaths
- Often forms dense carpets on the bottom
Similar plants
No other pondweed has the stiff two ranked, fernlike leaf arrangement.
Growth profile
| Growing season | Grows slowly through spring and summer and stays green on the bottom through winter. |
|---|---|
| Starts growing | Grows in cold water and low light |
| Light | Tolerates low light |
| Depth | 3 to 20 feet |
| How it spreads | Stem fragments and rhizomes; seldom flowers |
| Habitat | Deep, soft bottom lakes, often in clear, cool water. |
Why it matters in a lake
Forms deep carpets that hold soft sediment. Rarely reaches the surface.
Where it is found
- Idaho: Occasional
- Oregon: Rare
- Wyoming: Not recorded
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Alismatales |
| Family | Potamogetonaceae |
| Scientific name | Potamogeton robbinsii |
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Slender naiadNeed a hand?
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