The legend to Fig. 1 was published incorrectly in both the print and on-line versions of the article. The correct legend should read:
Fig. 1. Five different two-dimensional flower morphs tested in Experiment 1. (A) `No transparency' paper flowers, whose surfaces are covered with acetate film cut to their exact shape, to control for fine texture. (B)`Transparency' flowers covered with a square (9 cm×9 cm) sheet of acetate film. Arrows and brackets indicate a priori comparisons: (I)`Half lobes vs medium disks' compares flowers with similar surface area but different edge-to-center distances. (II) `Half lobes vssmall disks' - compares flowers that have different surface area but the same edge-to-center distances. Note: all flowers have accessible nectaries at their centers.
The authors apologise for this error and any inconvenience caused.
