This is the yellow form of Dendrochilum wenzelii. The plant is growing in a 4-inch plastic basket with New Zealand sphagnum moss as the media. I obtained this plant 3-4 years ago from H&R Nurseries. The plant is hung outside under 50 percent shade cloth. After the flowers die off, I plan to replant this into a 6-inch plastic basket with sphagnum moss. The plant seems to like sphagnum.