They are aerial roots. Don't be concerned with them. Take cuttings consisting of 2 or 3 stem segments (phyllocades), let them dry or callous for a few days (some only let them dry for a few hours) and stick them into some fast draining mix. Water but not to the point of waterlogging them. They should root in about 4 to 5 weeks. This is my experience. Others may have differences.
