Number of lateral stems (A) and dwarf shoots (B) for a fixed initial height of 25 mm. Graph A represents the number of lateral stems for each population regardless of the watering regime since the effect of this factor was not significant on the number of lateral stems. Graph B represents the number of dwarf shoots for each population × water regime (well-watered, WW and water deficit, WD). Error bars denote 95% confidence intervals. Letter codes denote homogeneous groups (GLM, Tukey-HSD test, p < 0.05) among populations.