Thanks for the mira hybrid photos, red lowii, especially that last one of the Sabre & lowii x (ampullaria x mira), which really puts the difference into perspective. The internodes are indeed very short. Of course, lowii is not known for its long internodes, either
<a href="http://s81.photobucket.com/user/Heathcp/media/Exotica%20Collection/IMG_1096.jpg.html" target="_blank">http://i81.photobucket.com/albums/j216/Heathcp/Exotica%20Collection/IMG_1096.jpg</a>
whereas maxima is a strong climber, as is ampullaria, although most people don't let it grow out
http://www.borneoexotics.com/photos/temp/amps_in_nursery.jpg
Perhaps the combined mira/lowii influence in both hybrids keeps the internode length in check. My hope is that mira will exert similar influence in primary hybrids, too. I like to grow plants to specimen size, and as an indoor grower, I'm discovering that specimen-sized vining plants can be a challenge. It would be nice to find plants that are more bush/shrub than vine at maturity, as your mira-brids are, although I know that non-vining Nepenthes are certainly the exception in this genus.
Your truncata x ephippiata is another good example of a non-vining plant, more or less, in addition to being an example of excellent growing
<a href="http://s81.photobucket.com/user/Heathcp/media/Exotica%20Collection/IMG_1096.jpg.html" target="_blank">http://i81.photobucket.com/albums/j216/Heathcp/Exotica%20Collection/IMG_1096.jpg</a>
whereas maxima is a strong climber, as is ampullaria, although most people don't let it grow out
http://www.borneoexotics.com/photos/temp/amps_in_nursery.jpg
Perhaps the combined mira/lowii influence in both hybrids keeps the internode length in check. My hope is that mira will exert similar influence in primary hybrids, too. I like to grow plants to specimen size, and as an indoor grower, I'm discovering that specimen-sized vining plants can be a challenge. It would be nice to find plants that are more bush/shrub than vine at maturity, as your mira-brids are, although I know that non-vining Nepenthes are certainly the exception in this genus.
Your truncata x ephippiata is another good example of a non-vining plant, more or less, in addition to being an example of excellent growing