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I was pleased to see more information on the invasiveness of pseudocorus 
appearing but I would still like to know of locations where it has actually 
spread iand pushed out native species.  Most of the information that I have 
been able to find suggests that it will grow in the wild but does not really 
spread.  The one exception is a nature reserve in eastern British Columbia 
where it is clearly invasive.

My real interest at the moment is finding confirmation on a rumour that the 
State of Maryland has classed pseudocorus as a protected species!  Does 
anyone have a reference that could confirm this or a telephone number of the 
right State government department which will allow me to check?  If so, I 
would be grateful to have this information before next weekend as I am 
giving a talk to IUCN World Conservation Conference advocating greater 
international cooperation on invasive plants and wish to use pseudocorus as 
an example.

Ian E. Efford, Ottawa

PS  Over most of northern N.Am. purple loosestiffe is very invasive and is 
damaging both wet agricultural land and eliminating a great deal of the 
natural biodiversity of plants and animals in wetlands.  There has been a 
lot of research undertaken on this topic on both sides of the border.  
Beekeepers were spreading this species deliberately as bees that feed on it 
produce a large amount of honey.  Now they are asking for it to be destroyed 
(basically impossible) as the quality of the honey is so poor.  
Ian E. Efford
Ottawa zone 3

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