Just a little more info on N. coccinea: the plants being sold in chain store operations (Lowe's etc.) are tc plants from Belgium. They are labelled coccinea, and most likely, N. coccinea was used as the female parent. Not sure as to what was used for the pollen, but it could very well be an N. coccinea as well. Look at it this way. The seed used to produce the tc clones would be (N. coccinea x N. coccinea). The old original victorian cross was named by James Taplin, and they were all the red color pitchered seedlings from the grex. Some are male and some are female. Like what Swords said, the cross was (mirabilis x hookeriana). This same and subsequent crossing by Taplin resulted in other names; N. paradisae, N. robusta, N. Lawrenciana and Willian Court made the same cross and called it N. Wrigleyana. As far as I know, N. Morganiana is the only true cultivar-a single plant-its female and it was the result of the reciprocal crossing of (hookeriana x mirabilis), which might account for its more extreme tubby look.
Nepenthes hybrids are fun too!
Trent