Abstracto
- The long-petaled slipper orchid of Central American has a complex nomenclatural history. Since the first publication of the name Cypripedium humboldtii, this plant has been treated under a number of different synonyms. Here we reconsider the oldest name, suggesting that Warszewicz validly published it, and that the name Phragmipedium humboldtii must be used for this taxon.