Abstract We present a checklist of soil-dwelling bryophytes and lichens for the south Puget Sound prairies based on field investigations of seven prairie sites conducted over the period of 2012–2014. We report a total of 32 terrestrial bryophyte taxa including 27 mosses and 5 liverworts, representing 20 families and 27 genera. We report a total of 32 terrestrial lichen taxa, representing three families and three genera. Four lichens, Cladonia novochlorophaea, Cladonia ciliata var. ciliata, Cladonia ciliata var. tenuis and Cladonia portentosa ssp. pacifica are proposed State-listed lichens considered rare by the Washington Natural Heritage Program. We report one additional species that was not listed on the WNHP rare lichen list, but appears to be rare in Washington: Cladonia concinna. We recommend that Cladonia concinna be added to the Washington Natural Heritage list of rare lichens. We did not find any State-listed bryophytes. We did, however, find one non-native moss, Pseudoscleropodium purum, which ap...