yesterday I forgot to mention that I can offer N. ventricosa pollen at
the moment. I will try to store some of this pollen in liquid nitrogen
after having dried it and thereafter using it on a female plant. If
seeds will be produced I think some kind of a pollen bank would be
worthwile. I heared that this storage method works in other plant
families but of cause it has to be tried in Nepenthes. In liquid
nitrogen cells can be stored for almost indefinite periods of time...
All the best
Andreas