Re: native North American aroids
In a message dated 12/09/1999 11:40:48 AM Eastern Standard Time,
<< Just to throw in my two-cents worth so to speak: It is possible that
Pistia stratioides originated in Asia or Africa and migrated to South
America without the involvement of man. >>
There is another scenario as well. If Pistia is ancient enough in its
lineage, the species may predate the separation of Africa and South America.
Much has changed over time including the reversal of the flow of the Amazon
which used to flow into the Pacific!