Flowers "wave" in the breeze on long stalks to attract passing insects, reports BBC News.

[The] experiments reveal that flowers mounted on long, thin stalks move around more in the wind.

This acts as a powerful signal to passing pollinators, allowing the plant to attract more insects than less mobile flowers growing atop short, thick stems.

"We found wavy flowers are more visible to insects, and thus attract more pollinators and set more seeds," said John Warren.

http://news.bbc.co.uk/2/hi/science/nature/7388689.stm