Ludwigia (plant)
genus of plants
Ludwigia (primrose-willow, water-purslane, or water-primrose) is a genus of about 82 species of aquatic plants with a cosmopolitan but mainly tropical distribution.
Currently (2023), there is much debate among botanists and plant taxonomists as to the classification of many Ludwigia species. Botanists from the US Department of Agriculture are currently doing genetic analyses on plants from the Western US and South America to better classify members of this genus.
The genus was named by Carl Linnaeus after Christian Gottlieb Ludwig (1709-1773).
Fossil record
The oldest known remains of the genus are known from Eckfelder maar in Germany, dating to the Eocene. Ludwigia pollen was also found associated with beetles belonging to the families Buprestidae and Scarabaeidae, suggesting that these flowers were likely pollinated by beetles rather than hymenopterans as is typical in modern species. A large number of fossil seeds of †Ludwigia collinsoniae and †L. corneri have been described from middle Miocene strata of the Fasterholt area near Silkeborg in Central Jutland, Denmark.
Selected species
Listed from the NCBI database:
References
Wagner, W. L., Hoch, P. C., & Raven, P. H. (2007). Revised classification of the Onagraceae. Systematic Botany Monographs, 83.
This brief starts where responsible research should: with the source description of “Ludwigia (plant)” as genus of plants. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as genus of plants. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jun 1, 2026. The linked authority identifier is Q158391. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2023, 1709, 1773 and 2007.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Ludwigia (plant)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.