Exotic hibiscus can really surprise you at times with their transformations.  You can take a photo of a bloom in the morning, and then take another in the afternoon, put the photos side by side and you'll have a hard time convincing people it is the same bloom. Environmental conditions also have a major influence on what a hibiscus bloom will look like Here's Cajun Hibiscus Red Beans 'n Rice last week.And here is a bloom on the same plant six weeks earlier.