FIG. 31.2 The shoot apical meristem. The shoot apical meristem consists of undifferentiated cells that divide rapidly, giving rise to all the cells in stems and leaves. (a) The seedling is rowan (Sorbus acuparia). (b) The photo shows a longitudinal section of the shoot apical meristem of coleus (Solenostemon scutellariodes). (c) This scanning electron micrograph shows the shoot apical meristem of tomato (Solanum lycopersicum).