该研究对罗汉松属和竹柏属植物叶横切面和纵切面输导组织结构进行观察。结果表明：罗汉松属叶1条主脉，主脉维管束木质部管胞发达，转输......

The conducting tissue structure of transverse and longitudinal sections was observed on leaves of Podocarpus and Nageia.......