The flowers of blueberries are racemes. Inflorescences mostly lateral, sometimes terminal. It consists of 7~ 10 flowers, bisexual, solitary or twin in leaf axils, with radial symmetry or bilateral symmetry. Blueberry buds usually grow at the top of branches. In spring, flower buds germinate for 3-4 weeks before reaching full bloom.

Black pearl is a kind of bronze pearl, which belongs to a very valuable jewelry variety. Symbolizing the crystallization of the most difficult years, it is called the most painful tear of the mother shell, which is precious after suffering.