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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Are there look-alikes?

Sort of. There are native species of water primrose that grow in the wet areas invaded by the non-native water primrose. However, the natives have small, inconspicuous flowers and opposite leaves, in strong contrast to the showy flowers and alternate leaves of the invasive Ludwigia species. Invasives on the West Coast include L. peploides, L. grandiflora and L. hexapetala, all of which require genetic tests to differentiate one from the other.

Ludwigia palustris 
©2008 Keir Morse