It has been my understanding through research that sphagnum moss is harvested from the surface of peat bogs. This way more sphagnum can continue to grow and be harvested, thereby preserving the peat bogs.
It might be so much simpler if suppliers would just label their product "Milled Sphagnum Moss," but then it wouldn't sound so desirable now would it.
Well, my point to begin with in bringing up peat moss aka sphagnum peat moss aka milled sphagnum moss is that it contains carbon that is needed for good healthy plant growth.
Through my anecdotal evidence, as opposed to scientific evidence, "peat" moss incorporated into my potting media is excellent for my adeniums.