Contributor
:
Por N. Ritter (CSU, Stanislaus Endangered Species Recovery Program) [~Alisma~, ~Echinodorus~, ~Helanthium~, ~Hydrocleys~, ~Limnocharis~, ~Sagittaria~] y M. Garvizu (USZ) [~Echinodorus~, ~Helanthium~, ~Sagittaria~]; revisado por S.G. Beck (LPB), M. Nee (NY), P.M. Jørgensen (MO).
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