AKA
English:
Water-shield, Dollar Bonnet, Water Target, purple wendock
Francais:
Brasénie de Schreber
See:
http://www.florelaurentienne.com/flore/Groupes/Spermatophytes/Angiospermes/Dicotyles/035_Nympheacees/01_Brasenia/schreberi.htm
http://www.planthardiness.gc.ca/ph_spp_intro.pl?speciesid=1003674&lang=fr