Taxonomic database format page, that explains what the various entries in the database are, and what they're used for.
And, of course, just like N. trusmadiensis, none of the Sarracenia natural hybrids, were actually ever validly published as nothospecies, which, at least, some of them are. They were published as species (which they were assumed to be, at the time), which I believe keeps those names from being accepted by taxonomists. This has never prevented authors of popular books, hobby growers, or nurserymen from using those names. They are basically invalid grex names, for known hybrids. These last few thoughts are from my own interpretation - I could be mistaken. If you are really curious about this, I recommend asking Jan Schlauer.