Wow! What amazing little creatures. The bud was salmon pink, but the flower is yellow on the inside, so the petals are two-toned.
The flower opens only in the evening. I thought it would open in strong sunshine, but I was wrong. I suppose the pollinators for L. dorotheae come out in the evening? The flower has no perfume that I can detect, but it could well have some odor not detectable by humans.
PS: Audrey is still taking her time, she's a slow and cautious gal.