In Mesozoic, Guangdong flora had a big change, the gymnosperm was prosperous, but it was evolved from the late Paleozoic Cathaysian flora as a whole.

• 中生代，广东植物区系成分发生了很大的变化，裸子植物大量繁盛，但总体上是在本区晚古生代华夏植物区系的基础上演化而来的。