About 200 years ago it was recognized that floral color attracted bees and other insects (Sprengel, 1793).Recently, visible (to man) floral colors have also been implicated in a pre-pollination isolating mechanism (Levin and Kerster, 1967;Levin and Schaal, 1970).The attraction of bees to flowers is governed by more than the colors visible to the human eye (Daumer, 1958).Bees, unlike man and other vertebrates, are capable of discriminating ultraviolet (UV) light (Daumer, 1956; Atrum and von Zwehl, 1964).Although
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C. Eugene Jones (1978) studied this question.
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