† Populations may not be currently present.
* HUCs are not listed for states where the observation(s) cannot be approximated to a HUC (e.g. state centroids or Canadian provinces).
References: (click for full references)
Nesom, G.L. and J.T. Kartesz. 2000. Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States. Castanea. 65(2): 123-125.
Wagner, W.L., P.C Hoch and P.H. Raven 2007. Systematic Botany Monographs: Revised Classification of the Onagraceae. 83: 243 pp.
Zardini, E. M., H. Gu & P. H. Raven 1991. On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae). Systematic Botany. 16(2): 242–244.
Zardini, E.M., H. Gu, and P.H. Raven. 1992. Erratum: on the separation of two species within the Ludwigia uruguayensis
complex (Onagraceae). Systematic Botany. 17(4): 692.
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.