The smallest veins are in direct contact with chlorenchyma, both palisade and spongy tissue.最小的脉是直接和栅栏组织及海绵组织的绿色组织相联结.Palisade tissue is rich in saliferous vacuoles.栅状组织富含含盐液泡。Palisade tissue is rich in saliferous vacuol...