Long known under the name Diacrium bicornutum, this species is found north of the Amazon River of South America. In the wild, the hollow pseudobulbs are frequently home to stinging ants. This orchid can flower anywhere between January and June, producing flower after flower in succession over several weeks. The flowers have a light citrus fragrance and are approx. an inch and a half or slightly larger across. Water regularly throughout the year, allowing the roots to just approach dryness between watering.

**Current plants listed in spike will flower late February to early March.