Delta arrowhead
Sagittaria platyphylla · Aquatic plants
Whole plant · Photo: mwseek / CC BY
Also called Delta duck potato
State noxious weed listing
- Oregon: A list
How to identify Delta arrowhead
- Oval to lance shaped leaves without arrow lobes
- White flowers with 3 petals
- Flower stalks bend down as fruit forms
- Tubers on runners
Similar plants
Native arrowheads have arrow lobes on the emersed leaves; water plantain has tiny flowers on a branched stalk.
Growth profile
| Growing season | Grows from spring, flowers in summer and overwinters as tubers. |
|---|---|
| Starts growing | About 55 to 60 F water |
| Light | Full sun |
| Depth | Moist shoreline to about 3 feet of water |
| How it spreads | Tubers, runners and seeds |
| Habitat | Ponds, canals and slow streams. |
Why it matters in a lake
Native to the southeastern states; invasive in other parts of the world where it clogs channels.
Where it is found
- Idaho: Not recorded
- Oregon: Rare
- Wyoming: Not recorded
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Alismatales |
| Family | Alismataceae |
| Scientific name | Sagittaria platyphylla |
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Baltic rushNeed a hand?
Is it taking over your lake?
We identify what is growing, map how much of it there is and build a control plan that targets it without harming the rest of the lake.
Idaho / Wyoming (208) 501-4531Oregon (541) 280-0596