Got this from the "nearly abandoned" table. The leaves were a little over-exposed but had this nice flower. Not a clue what it is....somebody knows this one for sure!
I totally agree with Psychopsis. The flower lacks any red colour, so it is an alba form, which most people call flava in Psychopsis.
In the market are papilio flava, Kalihi flava, Mariposa flava. In Mariposa the lip is normally rounder than here.