Hi

,
Many plants, coming from Indochina (Thailand, Vietnam, Cambodia and Lao) are sold as
N. thorelii.
The true
N. thorelii is not in cultivation.
You either grow
N. smilesii (formerly
N. anamensis),
N. kampotiana,
N. bokorensis or some undescribed species, or even hybrids between all these similar species.
They are more or less all species with linear-lanceolate leaves with clasping base and reddish pitchers.
If you want to have an ID (or, at least, a surmise of ID), INSIST on asking the location of your plant.
If you want to know more about the Indochinese
Nepenthes and the "
thorelii complex", please check the following thread:
http://lhnn.proboards.com/index.cgi?board=ht&action=display&thread=2768
Thank you for spreading the right information

.
Truly,
François.