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Lichen Flora of the Greater Sonoran Desert Region, Volume 1: The Pyrenolichens and most of the Squamulose and Macrolichens. Thomas H. Nash III, Bruce D. Ryan, Corinna Gries, and Frank Bungartz (Eds.). 2002. 532pp. $29.95, hardcover. ISBN 0971675902. Volume 2: Most of the Microlichens, Balance of the Macrolichens, and the Lichenicolous Fungi. Thomas H. Nash III, Bruce D. Ryan,...