>Is this a true variety of N. carunculata? Can anyone give me a clue as
>to its place of origin?
_N.carunculata_ as well as recent splitoffs thereof (e.g. _N.ovata_) do
come from C Sumatra. I cannot tell you what you have from the scant
description you have posted.
But be careful if it is really _N.carunculata_, as this will be lumped with
_N.bongso_ soon (Hi, Matthew)! You could perhaps keep an eye on your plants
if you notice some change with this nomenclatural rearrangement. ;-)
Kind regards
Jan