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一、引言在植物界,大约有900个属12,500种植物产生乳汁。这些植物分属于大约20个科,大多数是双子叶植物,但也有单子叶植物中的几个科和蕨类植物门苹科的一个属。在这些含乳汁的植物中大约只有分属于76个科(与上述数据有矛盾,它们引自不同文献一译者注)、几百个属的1000种植物含有橡
I. INTRODUCTION In the plant kingdom, about 900 genera and 12,500 species produce milk. The plants belong to about 20 families, most of which are dicotyledons, but there are also several families of monocots and one genus of the family Pinaceae, a fern. Only about 76 families of these milk-containing plants (contradicted by the above data, which are quoted in different sources), the 1000 species of hundreds of genera containing oak