Trisetella gemmata, this one is always a crap shoot. it seems very sensitive to humidity/light conditions as the spikes will abort if neither optimal conditions are met. consequently, certain spikes hit the sweet spot while others abort. to add to the frustration, the flowers only last about 3 days or so... out of 10 spikes produced this season, only 3 managed to flower, and all at different periods. would have been more impressive if multiple flowers were able to bloom at the same time.