Two leaves, varying architecture: graphs of (a) temperature T, (b) water vapour concentration C and (c) liquid saturation s profiles (as functions of leaf axial coordinates ξ1,2) at steady state for two-leaf plants in a 28°C environment, (d) with total water loss W1+2 (from both leaves) time courses. Plant architectures: compact (red), hyponastic elongated (cyan) and very hyponastic elongated (blue); upper leaf dashed lines.