Allan Ellis at Stellenbosch University and Steve Johnson at the University of KwaZulu-Natal in Pietermaritzburg have shown that the petals of Gorteria diffusa strongly resemble the bodies of female flies and cause male bombyliid flies to try to copulate with flowers.
Beverley Glover at the University of Cambridge, UK has proposed a hypothetical model for the genetic regulation of spot formation via morphological analysis. She proposes that a regulator of spot formation is present early in development which is subsequently lost leading to the spotting patterns observed. 
- Desirable daisies lure male flies with offer of sex, Shaoni Bhattacharya, New Scientist, 21 September 2010, with video of fly on the flower
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