I do not know the whole range of variability of _H.ionasii_, nor does it
seem too probable that _H.nutans_ (which may have pitchers rather similar
to those of the Tramen-tepui plant) should have reached the Ilu-massif. So
what I can say at the moment, you might be right with your assumption of a
new whatsoever-taxon (I'm not too happy with specific rank in
_Heliamphora_: too many "species" had to be lumped together after their
variability became evident). Perhaps you should consider varietal rank. OK,
if the plant really was closer to _H.nutans_ than to _H.ionasii_ (which I
cannot decide for reasons stated above), ssp. would be better than var.
because of geographic rather than genetic isolation, but as the same holds
true for _H.tatei_neblinae_ and nevertheless STEYERMARK did use var., this
rank would be in conformity with current infraspecific classification in
_Heliamphora_.
Do you have specimens of both, _H.ionasii_ and the Tramen-tepui plant?
Kind regards
Jan