Hi I got this cheap at a plant store after blooming with no id. The vendor just knew it was 'orchid' and said 'pretty flowers'. I kept it under lights in normal room conditions over winter and a few weeks ago I saw the spikes. It has suffered from the weather. I am wondering if you think it might be Miltoniopsis phalaenopsis Princess Diana of some sort. Any faint yellow on the white part of the flower is an artefact of the camera or processing; the white of the flower is pure white. The flowers are about 3" wide. Thanks. Joe

Image link: