. . . "Hydrocharis morsus-ranae L." . "GeoSpecies Knowledge Base Page: Species Hydrocharis morsus-ranae L." . . . "2010-07-15T12:42:09-0500" . . "Peter J. DeVries" . . . . . "http://lod.geospecies.org/ses/PF6pk.html" . "en" . .