Fig. 1

Phenotypic differences among populations. Means for height ((a), (d), (g)), crown width ((b), (e), (h)) and basal stem diameter ((c), (f), (i)) of plants that collected from north, central and south populations while be planted in South garden (bule box), Central garden (red box) and North garden (green box). Bars indicate standard errors. Significant differences are shown * (P < 0.05) or ** (P < 0.01)