"Clamshell Orchid" flower (or Cockleshell Orchid, Fragrant Anacheilium Orchid, Fragrant Prosthechea Orchid) in St. Gallen, Switzerland. Its Latin name is Prosthechea Fragrans (Syn Epidendrum Lineatum) Shutterstock Image - "Clamshell Orchid" flower (or Cockleshell Orchid, Fragrant Anacheilium Orchid, Fragrant Prosthechea Orchid) in St. Gallen, Switzerland. Its Latin name is Prosthechea Fragrans (Syn Epidendrum Lineatum) - ID: 770554336