C. flavosanguineus C. pulverulentus C. rainisii C. sinopulverulentus Cyanoboletus is a fungal genus in the family Boletaceae.

Circumscribed in 2014, it contains four species: C. flavosanguineus,[1] C. rainisii, C. sinopulverulentus, and the type, C. pulverulentus.

The generic name is derived from the Ancient Greek cyano ("blue"), referring to the deep ultramarine blue bruising reaction of the fruit bodies.

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