Imshaug, HA 1957: Alpine lichens of western United States and adjacent Canada. I. The Macrolichens. - The Bryologist60(3): 177-272. [RLL List # 25 / Rec.# 9063] Keywords: CANADA/ USA/ ALPINE/ KEYS/ NEW TAXA/ TUNDRA/ STEREOCAULON/ UMBILICARIA/ DACTYLINA
Abstract: 2 figs. 85 maps. [Many species; keys. New: Stereocaulon subalbicans sp. nov., S. deoreaultii var. caespitosulum (Nyl.) Lamb comb. nov., Umbilicaria lambii sp. nov., U. coriacea nom. nov. for Gyrophora rigida DR. non Hoffm., U. sect. Decussatae (Schol.) comb. nov., U. krascheninnikovii var. darrowii (Frey) comb. nov., Dactylina madreporiformis fo. sorediata fo. nov.]