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Two types of perianths in the sexually deceptive orchid genus Ophrys. O. cephalonica (A) possesses a green perianth which appears similar in colour to the leaves and stem. O. heldreichii (B), in contrast, shows a conspicuous pink perianth. Males of Eucera (Tetralonia) berlandi (C) have enlarged eyes and antennae compared to their females and are the pollinators of O. heldreichii.
