Observed versus predicted cross-validated values of assimilation (A), transpiration (B), stomatal conductance (C), intercellular CO2 concentration (D), instantaneous water-use efficiency (E), intrinsic water-use efficiency (F), leaf temperature (G), leaf chlorophyll concentration (H), leaf water potential (I), leaf osmotic potential (J), leaf osmotic potential at full turgor (K), relative water content (L), succlence (M), specific leaf area (N), and total stomatal density (O). Error bars for predicted values represent the sd generated from the 500 simulated models. Dashed line is 1:1 relationship.