《中国植物志(第17卷·英文版)》讲述了：The flora of China is the most diverse in the North Temperate zone and is one of the richest in theworld.It includes some 8。500 species of trees and shrubs.China is the only country in the world thatincludes unbroken transitional zones connecting tropical，subtropical，temperate，and boreal forests.Somegenera of vascular plants（e.g.，Metasequoia，Ginkgo，Cercidiphyllum），which are known only as fossilsin Europe and North America,have survived in China.Therefore，knowledge of the flora of Chinais essential for interpreting the fossil record and understanding the vegetational history of North America，Europe，and elsewhere in Asia，for protecting the plants adequately，for utilizing them well economically，and simply for learning the properties of a significant fraction of the world’s plants
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