I received this one several years ago as Pleurothallis calyptrostele, but later saw the seller listing it as Pleurothallis sp. 'Panama' as they were unsure of the actual species. At the time, I was keeping the majority of my orchids fairly wet, which this one didn't seem to mind at first but later began to decline. I eventually moved it to a higher spot and began only watering it once a week at the most; it has responded well to this "neglect", putting out healthy new growths and, just recently, this flower spike. I believe this is Pleurothallis microphylla. It seems like the flowers of this one aren't posted too often, so I thought I would share. The flower close-up is a five image composite, manually stacked. The other close-up shows my index finger, for size reference!