Close up of a plant stem revealing the remarkable structural complexity and cellular diversity that exist in plant tissues. 'Arrays' of different cell types are present, each cell population performing specific functions in plant growth and survival. The cambium, the specific collection of tiny stem cells that give rise to all other cells in the stem, appear cyan in colour. The plant carries a molecular marker that labels the water-transporting cells of the stem (blue). Collectively, the cells produce a spectacular pattern, just one example of the beautiful cellular tapestry found in nature.