The organographic distribution, structure and ontogeny of non-articulated laticifers are studied inPlumeria alba. The distribution of laticifer branches is studied in stem, pedicel, petiole, lamina, petal, stamen, ovary, wall, style and stigma. Laticifer branches are observed in all except anther lobes and stigma. The wall of the laticifers is thicker than in the other cells and the cytoplasm contains many nuclei. Round starch grains were found in the neighbouring parenchyma cells, but starch grains are lacking in the laticifers. The laticifer branch can occur on either side of procambium of the shoot and these cells can easily be distinguished from other cells by larger size, prominent nuclei and denser cytoplasm. Laticifers grow intrusively along the intercellular spaces.