Chlamydomonas nivalis

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Chlamydomonas nivalis (which is not a flower as announced). This is a picture of a snowball suitable for throwing. It's colored by a microorganism, commonly classified as a green algae, which often tints patches of the melting mountain snow with this purple-red color. Being it its dormant state, chlorophyll is temporarily absent and its content of hematochrome determines the color.

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