Were conducted . the results show that all the 4 species of pine leaves have a specific transportation tissue . these 4 species are different from each other by their morphological and histological characteristics 对马尾松、云南松、华山松、油松的原植物形态、药材性状、显微构造、粉末特征进行了对比研究,发现四种松叶在组织结构上均具有一种特殊组织? ?转输组织。