Lower pitchers:

upper pitchers:

Nepenthes belii x ventricosa

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Extremely interesting plant!  This has been one of my all-time facorites.  Pretty easy to grow; I do notice it likes it shadier than other Nepenthes.  Too much sun burns the leaves.  It pitchers better for me in shadier conditions.  Even though it has N. belii in it, it has done quite well in wintertime colder temperatures.