Stock Photo - 12 October 2018, Austria, Vienna: The Herbarium of the University Botany Institute. With the preserved plants, rare flower pollen can be identified on the basis of the comparative piece. (to dpa ""The pollen profilers - with pollen on a manhunt"") Photo: Jan Gott/dpa. - Vienna/Austria

Stock Photo: 12 October 2018, Austria, Vienna: The Herbarium of the University Botany Institute. With the preserved plants, rare flower pollen can be identified on the basis.

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