Stereocaulon alpinum is a species of fungus belonging to the family Stereocaulaceae.

[1] It is similar to Stereocaulon paschale but differs from it in containing cyanobacteria of the genus Nostoc while S. paschale contains cyanobacteria of the genus Stigonema, which have a darker colour than Nostoc.

[2] Stereocaulon alpinum is a known host species to lichenicolous fungi, which are pathogenic or commensal species living on the surface or in the thallus of the lichen.

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