《中國植物志（第16卷·英文版）》講述了：China not only has about 30，000 species of vascular plants or about one-eighth of the world’s flora，but also has numerous species of food crops on which the survival of more than 1.2 billion Chinesedepends.as well as several thousand species of plants that are ornamental or important sources of medicine，oil，waxes，fibers，timber，aromatics，and other natural products.It is estimated that more than 5，000species of plants are used regularly as sources of medicine in China.Nevertheless，because of the continuedextensive land use.deforestation，and destruction of natural habitats，more than 3，000 species of plants areendangered and many are threatened with extinction.
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