article_snippet.sent: Professor Warren, based at the University of Aberystwyth, Wales, said the avocado tree displays 'unique flowering behaviour'.
article_snippet.sent: Professor John Warren found that during the day the trees, which grow in tropical and Mediterranean climates, flower with their 'female parts' ready to be pollinated by bees.
article_snippet.sent: The flowers close for the night and then the next morning The flowers reopen - but now The flowers use The flowers 'male anthers' to spread The flowers pollen.
article_snippet.sent: Professor John Warren Professor John Warren said: 'The whole elaborate exercise seems to have evolved to increase the chances of cross-pollination, while limiting the amount of self-pollination. '
article_snippet.sent: The botanist, from the University of Aberystwyth, pictured, said the plants limited the amount of self-pollination .
highlights_snippet.sent: Professor John Warren said the tree displays 'unique flowering behaviour'
  