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Single leaf, varying architecture: temperature within leaf (°C; filled heat map, left-hand scale bar) and water vapour concentration (mol m–3; colour contours, right-hand scale bar) in surrounding air, with saturation s variable throughout the petiole and leaf. Arrows indicate water vapour flux. Axis scales are in metres. (a) Compact plant with m1 = 0.5, β1 = 5°. (b) Very hyponastic elongated plant with m1 = 2.5, β1 = 50°. (c) Detail of (a). (d) Detail of (b).
