During the last several years, knowledges about systematics and evolution of the family Brassicaceae have increased greatly. As a natural taxon, the family is well defined by its cross corolla, stamens tetradynamous, silique or siliqua, and so on. But there are still some problems among its tribes, subtribes and genera. And because of the unclear of the genera delimition, there are many debates on the attaching of some species.
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