Fig. 9. Cell division patterns in cells located between developing primordia. (A,B) Reconstructed view of the shoot apex of the same plant at the same point in a time series. Elapsed time from the initial observation is marked. The lineages that result in a primordium in transition from P1 to P2 are marked in (A), while the lineages in the intervening region (IR) between two successive primordial regions P1P2 and P0P1 are marked in (B). Individual lineages are differentially color-coded.