This cultivar is twice the size of other P violaceas I have.  It’s flowers have somewhat green tips and are larger than the other violaceas too.  It was sold to me as Phal viridis but it’s first bloom ruled that out.  My belief is that ‘Millie’ is an example of what Eric Christenson, in his book “Phalaenopsis a Monograph” identified as a distinct population of P violacea from the island of Mentawai.  Although, while it does have the very long inflorescences that this population is said to have, it also has a ”somewhat flattened and fleshy rachis.”  So I don’t know.  Whatever.  It is clearly a violacea.