Abstract:The aleurone layer of Coix lacryma-jobi seed consists of one cell in thickness. The radial walls have plasmodesmata. Nuclei are present. The organelles are not found in the materials soaked in refrigerator but numerous ribosomes and some mitochondria with indistinct cristae ap-pear in the material soaked at room temperature (16-18f). Aleurone cells contain a large num-ber of aleurone grains and lipid bodies. The aleurone grains are composed of protein and insoluble polysaccharide, stain dark green with TBO pH4.4 and within the matrix usually have a spherical body which stains with Sudan black B but not with ABB, PAS and TBO. The lipid bodies are variablly sized and randomly distribute.