N. ventricosa x (ventricosa x talangensis) is the cross. There seems to be a fair amount of variability in this cross with color. No surprise since it is not a primary cross
The intriguing aspect is that many of them are quite squat and wide in pitcher shape. Some of them dramatically so! It has become even more pronounced as the plants get larger and more mature.
Fairly typical example for color and shape. They can get alot darker or lighter and alot wider!
How about this guy?? The constricted pitcher opening adds to the effect This is the only one that i have seen that has the significantly smaller pitcher opening