Ludwigia peploides

Photo: Julian Meisler

Synonyms: Jussiaea peploides

Common names: floating water primrose; California waterprimrose

Ludwigia peploides (creeping water primrose) is a perennial aquatic plant (family Onagraceae) that forms very dense, virtually impenetrable 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 Rating: High?

CDFA Rating: None?


Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Weed Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Ludwigia peploides Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Ludwigia peploides_infestation_copyright2013_NealKramer
    Ludwigia peploides (floating water primrose) infestation. Photo: &#169 2013 Neal Kramer
    Ludwigia peploides_leaf, stem, bracts and sepals_copyright2019_NealKramer
    Ludwigia peploides (floating water primrose) leaf, stem, bracts and sepals. Photo: &#169 2019 Neal Kramer
    Ludwigia peploides_growth habit_John Madsen
    Ludwigia peploides (floating water primrose) growth habit. Photo: John Madsen