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Is it philosophical, is it quite allowable, to assume without evidence from fossil plants that the family or any of the genera was once larger and wide spread? and occupied a continuous area?

在没有化石植物证据的情况下,假定植物科或任何属曾经是更大、分布更广的,这是合乎哲学的吗?占据了一个连续的区域?

— Asa Gray ASA灰色

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