An orchid matches its scent rhythm to the locals

Interesting, white flowers are white to attract pollinators at night, several orchids I’ve owned have a scent that is very strong after dark but barely there during the day.

We find that the floral scent of the orchid Gymnadenia conopsea differs between day and night, and the increase in scent from day to night is stronger in populations with nocturnal pollination. This is the first study to report genetic variation in floral scent emission rhythms within the same species, and this is an important first step to understand the evolution of floral scent.

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Diel pattern of floral scent emission matches the relative importance of diurnal and nocturnal pollinators in populations of Gymnadenia conopsea