Acronia canadentis

Canidentis means "dog's tooth" and the name in this case refers to the shape of the petals.  Acronia or Pleurothallis canidentis is from Costa Rica, Panama and Colombia and is only 12cm tall with 2cm flowers, which are produced one at a time from the sheath at the base of the heart-shaped leaf.  The unusual colors and size of the flowers make it a desirable species, but it is cool-cold growing, coming from higher elevations and does not seem to tolerate warmer temperatures very well.