Sorry I am also a bit lost by the spam problem so just reading this as
a one off message.
My tomatoes have bumps on the stems. I believe that its areas that can
be rooted. Is there any chance its them? I think they are called
adventitious roots and there is a picture at
http://www-plb.ucdavis.edu/labs/rost...ms/adstem.html but its a
bit poor and the only one I could find (sorry)