Scientific NameLudwigia palustris
Other Common Names:
Synonyms (former Scientific Names):
Ludwigia palustris var. nana
Ludwigia palustris var. americana
Ludwigia palustris var. pacifica
A creeping aquatic weed that grows along shorelines, in shallow water, and less often submersed in shallow water.
Arranged oppositely along the stem, oval-shaped/lanceolate, approximately 1/2 to 1 inch long. The leaves of creeping primrose are highly variable in color, from green to slightly red-tinged or entirely red- or purple-tinged. Leaves are without hairs (glabrous). Stems are creeping and rooting at the nodes.
Aquatic plant primarily of shorelines with opposite leaves and stems that root at the nodes. Additionally, the red- or purple-tinged leaves that sometimes occur help in the identification of creeping primrose. Several other primrose species occur as aquatics. Creeping primrose is the species most commonly encountered, however. The plant may create bladders/air pockets to keep the plant floating.
Flower Seed Head
Arise from the areas between the stems and the leaves (leaf axils) and are inconspicuous and without petals. The flowers are usually yellow with 5 petals and sepals and not too close to other flowers and ~1in (25mm) in diameter.
Seed capsules are around an inch long and contain 5 cells with rows of seeds (~1mm).
Coastal areas and ponds.
upright and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval