The species was first described by Italian mycologist Alfredo Riva in 1979 as Tricholoma pseudoimbricatum var.

Riva published the species with a new replacement name in 1984.

[2] T. roseoacerbum is found in Europe and northeastern North America.

The specific epithet roseoacerbum alludes to the rosy colouration in its cap, and overall resemblance to T. acerbum.

[3] This species is probably conspecific with Tricholoma radotinense Pilát & Charvát (1959).