> well done flowering the U.resupinata - I will aim to keep 
>          mine cool over Winter. I was surprised by your approach of 
>          keeping the plant drier over Winter. My instinct would have 
>          been to grow it under some what deeper water during Winter 
>          as I would imagine that the areas it lives would receive 
>          higher rain fall and flooding at that time of year. Have I 
>          been under some false assumptions?
These are very valid assumptions.  However, having seen this specie in the
wild - not far from my parents' house in the NJ Pine Barrens there is one
more factor that makes it dryer.  The winter is very cold and for a period of
a few monthes the surface of the soil freezes solid to depth of a few inches.
 This is all te plant needs to be dry since the plant grows at the same level
as the water.
BTW, I grow my Sarracenia in same climate and they don't mind freezing solid
to temps well below freezing for extended period of times.  They do hate the
constant thaw -freeze-thaw-freeze...as this will push the plants out of the
medium.  To prevent this I cover the plants with shade cloth all winter to
keep it frozen.
Christoph