These are Confederate roses (Hibiscus mutabilis 'Versicolor'), and the first five photos show a single flower taken at 10:00, 12:30, 15:30, and 16:30 on September 16, 2024, and at 5:30 the following morning. Because of this color change from pure white in the morning to pink in the afternoon, this variety is called sui fuyō, which translates to "drunken Confederate rose.
The sixth and last ones are red-and-white marbled. Some Japanese apricot trees produce flowers with this coloration, though a Confederate rose producing them is quite unusual. White apricot trees don't actually exist; instead, red ones produce white or red-and-white marbled flowers when they can't generate enough anthocyanins to turn red. The same may apply to this hibiscus.
The sixth and last ones are red-and-white marbled. Some Japanese apricot trees produce flowers with this coloration, though a Confederate rose producing them is quite unusual. White apricot trees don't actually exist; instead, red ones produce white or red-and-white marbled flowers when they can't generate enough anthocyanins to turn red. The same may apply to this hibiscus.
To see peach, Japanese apricot, or lespedeza blooming with white, pink, and marbled flowers on the same plant, take a look at the posts below: