Butterfly orchid

I have absolutely no idea which branch of the orchidaceae these guys belong to. Any help gratefully received and acknowledged. 8-)

Thank you Ann Brown! It's Platanthera shriveri. 8-)

Well what do you know, my darling wife is more correct. These are Epidendrum X obrienianum butterfly orchids, a cross between E. evectum and E. ibaguaense. I stand humble before her vast knowledge. 8-)