The CPN _N.gymnamphora_ photo (p.14) is quite certainly IDed correctly,
showing the short and small rosette leaves.
Also, Kondo's _N.rhombicaulis_ may be correct, the lower pitchers being not
that diagnostic. You need long shoots to see the angular internodes!
>Other than the hairs on N. hirsuta plants, there is not much else to
>distinguish this species.
Correct.
>N. thorellii looks a little like N. gracilis in growth habit.
Internodes with decurrent leaf wings: yes, pitchers: no!
>Pitchers can be green or completely red/pink.
This is the case with almost *all* species of _Nepenthes_.
> Pitchers are fatter than N.gracilis.
Yes.
Kind regards
Jan