I came across this photo of G. stapfii here:
http://eol.org/data_objects/21918485
It is a nice enough photo but what is really interesting is the location it was taken in; it was in Benin and maps showing the range of Genlisea have a big gap between Liberia and Ivory Coast to the west and Eastern Nigeria and Cameroon to the east.
Benin is squarely in the middle of that gap.
Probably Genlisea will turn up elsewhere in that gap where conditions are suitable.
LeeB.