As I've said before, I'm very new to this (thank you for bearing with me) and I'm generally clueless. These are blooming in my greenhouse. Beyond that they are orchids (they have pseudobulbs and the general 3-sepals, 3-petals conformation) I'm right in the dark. These are tiny (maybe 2cm across if that) on spikes that have been getting taller. The plant has thrown two spikes. What are they, please, how do I avoid killing them, and how do I make more? Thanks!