Ludwigia peploides ssp. montevidensis (creeping water-primrose)

Ludwigia peploides ssp. montevidensis

Photo courtesy Julian Meisler

Ludwigia peploides ssp. montevidensis (creeping water-primrose) is a perennial aquatic plant (family Onagraceae) that forms very dense, virtuallyimpenetrable mats which restrict fishing and boat access. It also out competes native aquatic plants. Ludwigia peploides can be found throughout California in rice fields, ditches, ponds, slow moving streams, and along edges of lakes and reservoirs. There is some confusion as to which non-native species occur in California and more than one, yet unknown, species may be invasive.

Cal-IPC Inventory rating: High

Cal-IPC Resources on Ludwigia peploides ssp. montevidensis

• California Invasive Plant Inventory Assessment Form (pdf) - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
• Cal-IPC News - Articles from our quarterly newsletter. Each issue is available as a pdf. List of articles on Ludwigia peploides ssp. montevidensis.
• Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. List of articles on Ludwigia peploides ssp. montevidensis.
• Don't Plant a Pest! - Alternatives to invasive plants for aquatic gardens.

Cal-IPC News Articles

• Burkhart, B. and M. Kelly (2005). Which weeds dominate southern California urban riparian systems? Cal-IPC News. 13: 4-5,12.

Cal-IPC Symposium Proceedings

• Meisler, J. A. (2008). Ludwigia control as a precursor to restoration: Progress and challenges. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
• Burkhart, B. and M. Kelly (2007). How to develop user-friendly riparian corridor invasive exotic species/habitat restoration master plans: Experiences on the San Diego and Otay Rivers. California Invasive Plant Council Symposium 2007. San Diego, CA, California Invasive Plant Council.
• Anderson, L. (2003). Aquatic weeds: Policy, prevention, and control. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
• Anderson, L., K. Zaremba, et al. (2004). Aquatic working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
Blair M.D., C. E. (2006). Invasive aquatic weeds: Implications for mosquito and vector management activities. Cal-IPC Symposium. Rohnert Park, CA.
• McNabb, T. J. and J. Meisler (2006). Two years of Ludwigia control in the Laguna de Santa Rosa process and progress. Cal-IPC Symposium. Rohnert Park, CA.
• Meisler, J. A. (2005). Control of water primrose (Ludwigia hexapetala) in a freshwater wetland. California Invasive Plant Council Symposium 2005. Chico, CA.
• Verdone, L. (2003). Creeping water primrose (Ludwigia hexapetala) in the Laguna de Santa Rosa. California Invasive Plant Council Symposium 2003. Kings Beach, California, CA.
• Verdone, L. (2004). Creeping water primrose (Ludwigia hexapetala): The ecology and impacts of an invasive aquatic plant in the Laguna de Santa Rosa. California Invasive Plant Council Symposium 2004. Ventura, CA.

Other Resources on Ludwigia peploides ssp. montevidensis

• USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
• Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
• CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
• The Nature Conservancy Element Stewardship Abstract - Information compiled by TNC land managers. Photos included for some species.
• CalPhotos - Images of plants taken mostly in California.

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