Pleurothallis and its related genera (including Specklinia) are some of the few orchids that will grow from detached stems, even leaves. I have always wondered why they do this, but it may have something to do with their habitat preferences- high winds must have been regularly knocking sections from these delicate plants, and nature 'thought' that instead of letting these waste away, they make great cuttings!
With the way your plant looks, it obviously 'feels' like it's still in a Costa Rican high altitude forest to produce growths like that! I guess orchids, like many other groups of plants, can only be successfully cultivated if we can give a care regime that will make them 'think' they are still in their natural habitat.
I'm anthropomorphizing too much so I'm outta here