Epipactis tremolsii ssp. lusitanica - (Orchidaceae)

Identification of the plant shown below is problematic. It may be an unusual colour form of E. tremolsii, but could be an hypochromatic specimen of E. helleborine.

Epipactis lusitanica

We found this orchid in mixed cork oak and pine woodland close to the border between the Algarve and Alentejo in early May.