Zea mays enlarged approx. 450 times in SOMSO-Plast®. After Prof. Dr. W. Weber. The model shows the special leaf structure of a C4 plant. The vascular bundles are enclosed by a sheath in ring form. The chloroplasts of the sheath correspond with the biochemical work appropriation in the case of photosynthesis and are clearly larger than the chloroplasts of the mesophyll cells. The vascular bundles are interlinked with each other by transversal anastomoses. In one piece on a stand with green base and description key.