. _:b76160645 . _:b76160645 "GBIF id" . . _:b76160645 . "Ceratophyllum demersum var. cristatum" . "Ceratophyllum demersum var. cristatum" . . "Ceratophyllum demersum var. cristatum (Spruce) K.Schum." . . "(Spruce) K.Schum." . . . . _:b76160645 . _:b76160645 "5572829" . "770524" . "5572829" .