Spirodela punctata (G.Mey.) C.H.Thomps.
kingdom: Plantae >
subkingdom: Pteridobiotina Britton & Brown >
phylum: Tracheophyta >
class: Liliopsida >
order: Alismatales >
family: Araceae >
genus: Spirodela Schleid. >
Argentina Northeast , Argentina Northwest , Argentina South , Azores , Bangladesh , Bolivia , Brazil North , Brazil Northeast , Brazil South , Brazil Southeast , Brazil West-Central , Chile Central , Colombia , Costa Rica , Cuba , Ecuador , El Salvador , Germany , Illinois , Indiana , Kentucky , Leeward Is. , Panamá , Paraguay , Peru , Portugal , Puerto Rico , Spain , Suriname , Tennessee , Uruguay , Venezuela