Optical phenomena, Taivaanvahti (2.6.2018)

[Timo Kuhmonen]

First time I see this kind of photos (Uusikaupunki, Finland)
https://www.taivaanvahti.fi/observations/show/81712

Photo is taken in the summertime. This plant is called Cloudberry (Rubus chamaemorus). Have picked them, but never seen this kind of effect. I am not sure whether the optical phenomena is related to surface of the flower petals. Other possible explanation maybe that something has happened to the light rays (split into spectrum strips?) before hitting the flower petals....

Think I need to keep eyes open next summer, when looking for berries to pick up...