somoene somewhere sometime told me (hey... I was new! can't find the post for some reason) that the bristles on n. lowii's pitchers (lower) were it's trademark... well, correct me if I'm wrong but Nepenthes ephippiata also has them!
http://bestcarnivorousplants.com/CP_Phot....mek.jpg
http://home.t-online.de/home/jmarabini/kultur7.htm
http://bestcarnivorousplants.com/CP_Phot....mek.jpg
http://home.t-online.de/home/jmarabini/kultur7.htm