Invasive Species: Water Primrose and Floating Primrose-Willow
Ludwigia hexapetala
Ludwigia peploides
Water primrose is an invasive aquatic species that forms extensive mats, impairing water flow and shoreline activity.
Why is it important to control?
It can dominate shoreline vegetation if introduced to lakes, rivers, ponds or streams. It is very difficult to control once established.
How can you identify it?
![Ludwigia hexapetala flower Close up image of Ludwigia hexapetala flower](https://yamhillswcd.org/wp-content/uploads/2024/01/Ludwigia_hexapetala_Alvesgaspar_Wikimedia_CCSA3.0.jpg)
Habitat: | Shallow, slow moving water |
Life Cycle: | Perennial |
Height: | Submerged stems up to 6 ft |
Leaf Description: | Leaves on stems without flowers are oblong. Leaves on flowering stems are lance-shaped. |
Fruit & Flower Description: | Bright yellow flowers |
Bloom Time: | July to September |