Ken, Edward,
Dont worry, Im not so addicted with nep... For now, the only Nepenthes that Im interested is
N. albomarginata red!!!
strath76,
green form of purpurea that I have is not as green as you mention. It have red pigment on it... Probably I had mislabelled it...
https://forum.petpitcher.net/showthread.php?t=1704