Hard to find Prostechea (formerly Encyclia) sima.  These are large plants currently in 3.25" pots but would love a bigger (5"-6") pot or basket. 

This species produces 3-6 elegant, long-lasting, white flowers per spike. The flowers measure 1"-1.5" and have a light, rich honey-like fragrance. This species flowers from winter to late spring.

Care: similar to Oncidiums or Cattleyas. Cool-hot temps. Lots of water when it's warm or the plant is actively growing and keep fairly dry when it's cool in the winter. Very bright indirect light to partial sun.