Fig. 4. Proportions (%) of P. bulbosa plants with different leaf colours (gy, greyish; gy‐gn, greyish‐green; gn, green) in each of the sub‐groups with the following leaf shapes: curved (C, 55 plants), slightly curved (sC, 34 plants) and straight (S, 52 plants). Populations were sampled along an aridity gradient of 110–810 mm rain year^–1. Bars are 95 % confidence intervals.