Relationship of seven western cedar populations after exposure to drought with continentality (A) relative water content at turgor loss point (RWC_tlp), (B) osmotic potential at turgor loss point (Ψ_tlp), (C) cuticular transpiration (TFD_cuticular) and (D) intrinsic water use efficiency (WUE_i); mean summer precipitation with (E) relative water content at turgor loss point (RWC_tlp) and (F) modulus elasticity at saturation (ε_max); annual precipitation with (G) osmotic potential at turgor loss point (Ψ_tlp) and (H) cuticular transpiration (TFD_cuticular). The r is Pearson’s correlation coefficient, and the line provides a visual assessment of qualitative trends in the data. Table I describes more details of environmental indices.