Marsh yellowcress
Rorippa palustris · Aquatic plants
Whole plant · Photo: Сергей Крыленко / CC BY
Also called Bog yellowcress, Marsh cress
How to identify Marsh yellowcress
- Annual or biennial 1 to 3 feet tall
- Deeply lobed leaves
- Tiny yellow four petaled flowers
- Short, plump seed pods on spreading stalks
Similar plants
Watercress has white flowers and grows rooted in water with rounded leaflets.
Growth profile
| Growing season | Sprouts in spring on exposed mud, flowers June to September. |
|---|---|
| Starts growing | Spring on wet mud |
| Light | Full sun |
| Depth | Wet mud to shallow water |
| How it spreads | Seeds |
| Habitat | Muddy shores, drawdown zones, ditches and wet fields. |
Why it matters in a lake
A common native that colonizes exposed mud as water levels drop. Harmless.
Where it is found
- Idaho: Common
- Oregon: Common
- Wyoming: Common
Classification
| Kingdom | Plantae |
|---|---|
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Brassicales |
| Family | Brassicaceae |
| Scientific name | Rorippa palustris |
Canada thistle
Foxtail barley
Pale smartweed
Curly dock
Barnyardgrass
Nodding beggarticks
Wild mint
Toad rush
Perennial pepperweed
Poison hemlockNeed 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