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. 2018 Dec 13;65(4):467–481. doi: 10.1093/cz/zoy096

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© The Author(s) (2018). Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 6. — Images of the 8 stimuli triplets used for the behavioral experiments. Each column represents an image of S. laciniatum at an inclination angle (ϕ)=15° and various orientation (ϴ) angles: (A, I, Q) 0°; (B, J, R) 45°; (C, K, S) 90°; (D, L, T) 135°; (E, M, U) 180°; (F, N, V) 225°; (G, O, W) 270°; and (H, P, X) 315°. Images on Set A (first row) represent flowers of Solanum at different ϴ angles but without indication of angle dependent color effects. Set B represents the same ϴ angles as in Set A, but the pattern produced by the perceived angle dependent color patches at each viewpoint is indicated with a “yellow” color which is easily discriminated from the pigment color by a bee. Set C represents the same angle dependent color patterns as in Set B, but excludes visual information about flower morphology. The violet color making the background of images in Set C correspond to a printer ink interpretation of the petal color of images in Sets A and B (see details in Supporting Information S-2).