I don't know, but I'll look at the pictures that you mentioned.
>D. binata multifida
>I'm not sure this is the problem either. Any ideas?
I have a couple, and they are all about your cultivation. OK, first off,
I go with Miguel de Tempe's suggestion and take a root cutting. Just
cut out a root about two inches long, lay it horizontal in dead, milled
Sphagnum, about 0.5---1.0 cm beneath the substrate. Keep moist and warm
and wait about 2-3 months. Leaf cuttings have never worked for binata
plants with me... As for the mother plant (which you have tried not to
disturb too much with your surgery), where is it growing? I am guessing
that you have it in a terrarium under lights. I have found that if this
plant is in a terrarium, it is highly susseptible to getting a touch of
mold on the forming leaf, which is then aborted. Inflorescences are
particularly affected. The plant prefers more air circulation, or at
least that is my impression. Maybe if you can, lower the humidity...
Just some thoughts. Are you having success with any of the other
binata plants?