creeping waterprimrose
Ludwigia peploides (Kunth) Raven


Ludwigia peploides is a perennial herbaceous plant of wetlands whose sprawling stems usually grow flat along mud or the surface of the water. It is native to parts of Australia, New Zealand, North America, and South America.
Leaves are alternately arranged and vary in shape and size, from lanceolate to ovate. They range from 0.5-4 in. (1.27-10.2 cm) long. Leaves are hairless and have smooth margins. Leaf petioles range from 1-1.5 in. (2.5-3.8 cm) long.
L. peploides has solitary flowers are held on stems arising from the upper leaf axils. Stems can be floating or lying on the ground. Flowers have five bright notched yellow petals, 0.4-0.6 in. (1-1.5 cm) long.
Fruits of L. peploides are glabrous to sparsely hairy cylindrical capsules that contain many small seeds about 0.04 in. (1 mm) in size.
Ecological Threat
L. peploides forms dense, fast-growing, floating mats that can displace native aquatic plants, wetland grasses, lower dissolved oxygen and pH of the water, reduce water quality for wildlife and increase sedimentation.

Selected Images


EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit

State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Myrtales
Family: Onagraceae
Genus: Ludwigia
Subject: Ludwigia peploides (Kunth) Raven

Synonyms and Other Names

Other Common Names:
floating primrose-willow, creeping waterprimrose, floating primrose, floating primrosewillow


Plants - Forbs/Herbs