Unknown Sobralia species in my garden

I brought this Sobralia a few years ago as a small, two cane plant.  It has been growing slowly but steadily since then.  It now has several canes which I expect will bloom in the coming months.  It is growing at an altitude of about 1,000 feet above see levels in the mountains of Puerto Rico.  I find this plant easy to care for and it has not given me any problems.  I only water it during the dry season, the rest of the year the local rainfall is enough to cover its needs.  The flowers last only a single day.  If the day is particularly hot and dry this will make the flowers wilt sooner.  The flowers are fragrant.  I keep the plant close to main door of the house so that I don't miss the flowers when I leave the house in the morning.