Hi, a friend of me tried other species:
Dr. dilatatopetiolaris, Dr. paradoxa and Dr. petiolaris.
All worked and he had more success in pure water than in sphagnum, too.
It seems as if all the petiolaris-complex species can be propagated this way. So go and try!
Good growing/testing [img]http://www.**********.com/iB_html/non-cgi/emoticons/wink.gif[/img]