Re: native North American aroids
In a message dated 12/08/1999 8:47:06 AM Pacific Standard Time,
> Calla palustris (Water Arum) is found in North America but I'm not sure if
> it's native here; listed as "temperate regions of NA, Europe and Asia." I
> too much scrutiny could start a "What is 'native'?" debate.
It could be one of many circumboreal plants. A way to check this would be to
find the earlier floras, and see whether they list it; also, many floras
specify which plants are "naturalized."