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 | Cal Photos images |
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IPNI |
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Tropicos Taxonomic information from the Missouri Botanical Garden |
 | Calflora: Taxon report · Distribution · Observations |  |
KBD Kew Bibliographic Database |
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John W. Cross's site at the Missouri Botanical Garden |
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Wayne P. Armstrong's Lemnaceae site at Palomar College |
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Index Nominum Genericorum |
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GBIF
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Google Scholar
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JSTOR Plant Science |
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