Triotosiphon bangii

Masdevallia bangii or Triotosiphon bangii, now the correct name, is one of the smallest Masdevallias.  The plant shown is growing in a pot only 3-4 cm in diameter.  The tiny flowers are only millimeters in size and the plant only a few cm tall.  It is native to Ecuador, Peru and Bolivia.  This particular plant was awarded as a Masdevallia, however, and given a Certificate of Botanical Recognition by the American Orchid Society.  It is supposed to be tolerant of a range of temperatures, but I have found it a bit finicky, dropping leaves when not happy.  I keep it cool and moist.