The relic genera once occupied huge areas in North Hemisphere in the Tertiary or the late Cretaceous, while neo-endemism was mostly originated in the late Tertiary .
从起源上看， 被子植物的古特有属主要发生于晚白垩纪和早第三纪，地质历史上大都占有广阔的分布区；
The relic genera once occupied huge areas in North Hemisphere in the Tertiary or the late Cretaceous, while neo-endemism was mostly originated in the late Tertiary .
从起源上看， 被子植物的古特有属主要发生于晚白垩纪和早第三纪，地质历史上大都占有广阔的分布区；
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