[David]

Aliamyz,

N. xventrata is alata x vintricosa and not (alata x (ventricosa x alata). The "x" infront of "ventrata" indicates that it is a hybrid.

And the picture that edward post is xventrata, ie. alata x ventricosa. I have a very reliable source to confirm this.

Also Edawrd,

xventratas will loose it's beautiful reddish colours on the pitchers when grown in lowland conditions after a while. Not only that the pitchers will get smaller a little. These plants are grown in the highlands and has been brought down to the nursery where you bought it quite recently. That's why it is reddish but it would be more reddish if it is new stocks from the highland. You can see on the right side of the picture. The newest pitcher has a slight greenish bottom and smaller as it grew in lowland conditions.