Phlegmacium prasinocyaneum is a species of mushroom producing fungus in the family Cortinariaceae.

[1] It was described in 1939 by the mycologist Robert Henry who classified it as Cortinarius prasinocyaneus.

[1] In 2022 the species was transferred from Cortinarius and reclassified as Phlegmacium prasinocyaneum based on genomic data.

[2] It is found in Western Europe and Scandinavia.

[3] This Cortinariaceae-related article is a stub.