Nepenthes gymnamphora is another species shrouded in controversy. In Clarke's book he compares N. gymnamphora, N. pectinata, and N. xiphioides. I guess N. gymnamphora appears most similar to N. xiphioides of all. Those two species look very similar to me. The peristome kind of "plunges" down and is more oval than other Nepenthes. The N. pectinata I grow is definitely different from N. gymnamphora and N. xiphioides. I recently purchased a larger specimen than the one above so better photos should be coming. My small guy from Germany has grown rather slowly compared to my other highlanders.
Cultivation: easy to moderate, somewhat of a slower
Market availability: size 2 to small size 3; somewhat uncommon
Species variability: none that I'm aware of, but confusion among species authenticity between N. xiphioides and N. pectinata
$ / size: moderate $25.00 and up for larger plants
Cuttings: none available for trade