Botanist agree that presently there are about 2,45,000 species of flowering plants on earth and these have been grouped in to 430 families, depending on the authority concerned. However, a basic knowledge of angiosperms can be acquired by a study of a selected group of families.
The fact that a species has been named should make no essential difference in the way in which it is treated. The proper aim is not to name the species but to know them.
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