Hi Lien,
Nice photo! We've bloomed this clone in high temperatures, and the flower is almost entirely white, with very faint purple markings. We have a couple of flasks in the lab of a selfing, but the seedlings are not setting any growth records, so it's probably going to be while before we can tell whether the pale coloration becomes pure white when selfed. Probably not, but maybe a few will be. Here's a photo of one in bloom that we got from Marcia Whitmore last year to illustrate the color variability of this species. It was shown at the Batavia show last February and missed an award by a whisker. Great color and decent shape...........
Thanks,