Polarised light micrograph of a Cinclidium stygium moss leaf showing the chloroplasts within the cells. The chloroplasts, essential for photosynthesis, are clearly visible filling the cells, highlighting the mosss role in carbon fixation. The cell walls display striking birefringence colours, a characteristic phenomenon when viewed under polarised light microscopy. Magnification: x30 when printed with the longest axis at 10 centimetres long.