i've not heard of it before this, but it looks like it can be done.

Here is a link that might be useful: stem prop

Hey!
IT WORKS! If you remove the flower bud right as it is starting to develop, you can treat it with rooting hormone. The most popular hormone is called Kikigrow (although I have had success with rootone.
The best way to do this is to pack a small amount of hormone on the cut surface. With a twist-tie or an orchid clip (those little hair-clip things) fasten a small amount of moist sphagnum moss over the cut. Essentially, you are creating a small, exposed, air layer.

This method can actually be used at each 'node' along the length of the stem. Along the stem there are small leaflets that grow. You can use a sterile scalpel to cut these leaves from the stem, and treat them in the same way.

Professional orchid growers actually cut the entire stems from their plants and send them off to propagation labs where they cut the spikes into sections (each containing one node. These sections are treated with hormone, then placed in moss propagation beds. So yeah, propagation from spikes is very effective if down right!

Here is a link that might be useful: Envi Sci and FshyPlnts

I have propagated Dendrobium nobiles from stem cuttings. It works. Cut a leafless stem from the parent plant. Then cut the stem into sections. Each section should have at least 2 nodules.Lay the sections on a bed of moist spagnum moss. Then place the tray with the moss and the cuttings into a plastic bag.I then placed the enclosed tray under one of my plant tables.After a couple of months "new growths"!