"Jimbo" in :

I was wondering....when plumeria cuttings have started that fungus
rot (I think it is because of fungus) on the rooting end, that is, it
is starting to get blackened and "mushy", will the cutting still root?
Or should I re-cut the cutting above where the blackening begins, let
it sit for some days until a new callous is formed, and then plant?
What about if I just cut off the blackened part and immediately plant
it? Will the lack of a callous on the end prevent it from rooting?

i don't know where p's form new roots.
this
http://www.google.com/search?hl=en&l... s&btnG=Search
suggests they form roots from the callus, so i'd guess that no roots will grow from mush... as *you* also have been suspecting
:-)