Glew, K/ Rhoades, F 1997: Lichens. - In: : Endangered, Threatened & Sensitive Vascular Plants of Washington - with Working Lists of Rare Non-vascular Species. . Washington Natural Heritage Program. Department of Natural Resources pp. 50-57. [RLL List # 186 / Rec.# 22903] Keywords: ENDANGERED SPECIES/ RARE TAXA/ RED LIST/ WASHINGTON