Butyriboletus roseoflavus is a species of fungus in the genus Butyriboletus that is found in Asia. It was originally described in 2013 as a species of Boletus, but was transferred the following year to the newly created genus Butyriboletus.
It is known as xiaomei niuganjun () or huamei niuganjun () in Yunnan and huandian niuganjun () in Zhejiang.
Edibility is unknown, but a mushroom identified as xiaomei niuganjun is implicated in a 2014 poisoning leading to delirium and lilliputian hallucinations.
See also Hallucinogenic bolete mushroom
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