Nepenthes X briggsiana is a hybrid between N. ventricosa and N. lowii. This particular clone is featured in Peter D'Amato's book The Savage Garden. He has a nice profile of this plant if you care to read up on it. I remember visiting California Carnivores Nursery several years ago and was stopped in the aisle by this plant. As Peter would say, "It's another show stopper." I like the fact that it has the shape of the upper pitchers from N. lowii combined with the hourglass waistline of N. ventricosa. It really is a stunning plant. I've heard there are some other variations from the original hybridization of this plant. Hortus Botanicus grows their clone and another variety referred to as "Atlanta Giant" (I hope that's correct) is out there too. I believe Peter told me his version has more blood red in it than some other clones that are out there. I was fortunate to obtain this plant from him in trade for cuttings. I consider myself extremely lucky to own this plant. My other variety of N. briggsiana is what I call "Jeff Shafer". The reason for that is because I bought the rooted cutting from another grower who told me that his original plant had come from Jeff Shafer. He has the website Plants with Attitude. The grower also told me he has the "Peter D'Amato clone as well and they look very similar. To add more mystery is a few clones I have of N. burkeii x lowii that I got from a private collector. More than likely N. burkeii wasn't used but N. ventricosa instead back in the day when the hybrid was created. Basically they all look fairly similar and do produce pitchers that vary in color as they mature. Some tend to be redder and others have more stripes. They are very hardy plants and grow fairly quickly. I've also found out that this hybrid does readily produce multiple basals and roots from cuttings fairly easily too. I consider this to be a "classic" hybrid that is very sought after thus keeping prices on the expensive side. For those growers that want the look of N. lowii but can't provide cold enough temperatures, this hybrid comes pretty close and is more tolerant than the species of N. lowii. 

Cultivation: easy; moderate grower with hybrid vigor; may grow well as an intermediate indoors?
Market availability: rooted cuttings; limited
Species variability:  "Hortus Botanicus", "Atlanta Giant", "Peter D'Amato", "Jeff Shafer", and others
$ / size: collector's plant; $100.00 - $300.00 + for larger plants and cuttings
Cuttings: none available for trade
Sex: Peter D'Amato and Jeff Shafer clones are female