I never get tired for seeing pictures of this species and the different varieties that many of us have. This one looks great, and I too adore the floppy petals.
It's opened a bit more today (day 4) - I guess this one likes to take its time! This has been my first year blooming C. mossiaes and they're wonderful. I can see why it was popular in its heyday. It's a shame that it isn't more widely available and grown.
In addition to the colors and patterns, I've enjoyed the difference in fragrance between strains. Some are more floral, some sweeter... love all the subtle variations.