Because of the similarities coefficients of Dongjiang with other 4 floras are above 65%, which show that they are closely related, or are of the same origination.

• 由于东江流域植物区系与这4个植物区系属的相似性系数均大于65%25的，显示出它们之间的亲缘关系非常亲近，很有可能是同一起源。