Fig. 3. (A—C) Patterns of intensity I, degree of linear polarization and angle of polarization (measured from the vertical) of the plant surfaces in Fig. 2 measured by video polarimetry at 650nm (red), 550nm (green) and 450nm (blue). Number of pixels = 560x736=412160. In part C, regions are black where <10%. (D—F) Graphs of I, and in the red, green and blue spectral ranges versus the pixel number along the horizontal line in Fig. 2 and parts A—C. In part F, values are represented by dots where I>20% and >10%. The borders of the section through the red petal are marked with vertical broken lines. The vertical continuous line represents the pixel of a leaf, the optical characteristics of which (Table 2) are used for the calculations in Figs 7, 8. This pixel is marked with a vertical white bar in Fig. 2 and parts A—C.

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