What a title... lol
<Heli> How are you guys losing your hamatas?
<Brokken> Heli: The hamburglar.
Not to be a bubble-burster but AFAIK N. Miranda hybrid is sterile. I tried making several hybrids with it (N. Miranda x N. fusca and N. Miranda x N. aristolochoides x thorelii) and none took (they did make seed but it was all sterile) but perhaps you will be lucky?
You don't have to believe me, just do your crosses and see what happens.
I sent seed to numerous people on here nobody had reported any germination, maybe they all lied?
I'm not going to argue what someone else may or may not have done - I can only relate my personal experiences using N. Miranda pollen cut fresh from the live plant deposited on a newly opened ovary (or rather numerous ovaries) on those other plants. I had zero success from either crossing. Both crossings made seed, lots! but none sprouted for me or anyone who got any. I would have bought a seedling of it had anyone had success with them.
I made a post way back then called "My first hybrid N. Dominus!" (or something like that) and people told me the same thing I'm telling you that their N. Miranda hybrid attempts didn't work either. But if one guy was successful perhaps you will be too, give it a try and see what happens, it won't hurt to try.
Could be a genetically different northiana x maxima. I don't know how many are floating around out there.
I recently tried to cross miranda onto gracilis but all the pods I applied miranda pollen to stayed undeveloped while the others grew normally.
Still it's difficult to say if your plant is fertile or not without crossing it onto something first.
Mine had come from my aunts job (Bachmann's Floral) back in 2003 or so. They get the hanging baskets of garden center Nepenthes in several times a year: Miranda, "Alata" (ventrata), Gentle and Velvet.