Water primrose (Ludwigia peploides) has been detected in near by counties. It is an herbaceous invasive found primarily in shallow water systems including shorelines and wetlands. They grow either on the shore or float in up to 10 feet of water. The flowers are yellow and have 5 petals and the dark green leaves resemble willow leaves.
Our native seedbox (Ludwigia alternifolia) is commonly mistaken for water primrose. Seedbox has similar leaves and yellow flowers. However, seedbox flowers only has 4 petals.
Have you seen this species? Report it to us or on the MISIN website or smartphone app! Please include a photo to help with ID verification.
Environmental Impacts
Water primrose forms dense mats that can completely prevent water flow. This can cause localized flooding and water level changes. This species also displaces native species which lowers biodiversity and wildlife habitat quality.
Treatments
There are multiple treatment methods for water primrose. Those include chemical and non-chemical methods.
NON-CHEMICAL CONTROL METHODS
Cutting/ hand pulling: water primrose can be cut or hand pulled. If seeds are left behind they can and will resprout. Note: when cut, the plant may resprout. The site will need to be checked for new growth during the next growing season.
CHEMICAL CONTROL METHODS
Foliar spray: aquatic safe herbicide is sprayed onto the foliage of the plant. This is the most common and effective method to treat this species. Note: a permit from EGLE will be required to treat any plants in standing water.