Cephalanthera longifolia, the narrow-leaved helleborine, sword-leaved helleborine or long-leaved helleborine, is a rhizomatous herbaceous perennial plant in the family Orchidaceae.
Cephalanthera longifolia, known as the narrow-leaved helleborine, sword-leaved helleborine, or long-leaved helleborine, belongs to the family Orchidaceae and is a rhizomatous herbaceous perennial plant.