Primrose Willows West of the Cascade Mountains of Oregon and Washington of Oregon and Washington

The Genus Ludwigia

Large-flower Evening-primrose, Large-flower Primrose-willow: Ludwigia grandiflora - ?

False Loosestrife, Primrose Willow, Water Primrose: Ludwigia hexapetala (Synonym: Jussiaea uruguayensis) - Naturalized.

Eastern False Loosestrife, Marsh Seedbox, Marsh Primrose-willow, Water Purslane: Ludwigia palustris (Synonyms: Ludwigia palustris var. americana, Ludwigia palustris var. pacifica) -

Floating Primrose-willow: Ludwigia peploides ssp. montevidensis (Synonym: Ludwigia peploides ssp. montevidensis) -

Floating Primrose-willow: Ludwigia peploides ssp. peploides (Synonyms: Jussiaea repens, Jussiaea repens var. peploides) -