M. Schultz 2007: Revised cyanolichen key. - In: T. H. Nash, III, C. Gries and F. Bungartz: Lichen Flora of the Greater Sonoran Desert Region. Volume 3. . Lichens Unlimited, Arizona State University, Tempe pp. 414-420. [RLL List # 210 / Rec.# 30332] Keywords: SONORAN DESERT/ UNITED STATES/ MEXICO/ KEY/ CYANOLICHENS