P. tricholoma has been shown to be very closely related to Lentinus in the sense accepted on iNaturalist and elsewhere: https://doi.org/10.3852/14-084. Unfortunately, the name Lentinus tricholoma Berk. & Cooke already exists for another fungus. The epithet was thus taken from another synonym for the combination in Lentinus: https://www.researchgate.net/profile/Ivan_Zmitrovich2/publication/297731892_Lentinoid_and_Polyporoid_Fungi_Two_Generic_Conglomerates_Containing_Important_Medicinal_Mushrooms_in_Molecular_Perspective/links/56e196d408aec09a8bc08259.pdf, https://www.researchgate.net/profile/Ivan_Zmitrovich2/publication/279447065_Supplement_2_Taxonomical_catalogue_of_polyporoid_and_lentinoid_fungi/links/5592b69f08ae5af2b0eb541c/Supplement-2-Taxonomical-catalogue-of-polyporoid-and-lentinoid-fungi.pdf