Fifth prize. In this image captured by M. Reza Dadpour, the primordium (bud) of the weedy flower Tribulus sp. is shown at its final stages of development. More than 100 z-stacks were combined to produce the final image, which was captured using epillumination.
Dadpour belongs to the Department of Horticultural Sciences at University of Tabriz in Tabriz, Iran.