Petersen, Ronald H., and Karen H. Hughes. "New North American Species of Gymnopus." North American Fungi 9, no. 3 (2014): 1-22.

Hughes, Karen W., Ronald H. Petersen, D. J. Lodge, S. E. Bergemann, K. Baumgartner, R. E. Tulloss, E. Lickey, and J. Cifuentes. "Evolutionary Consequences of Putative Intra- and Interspecific Hybridization in Agaric Fungi." Mycologia 105, no. 6 (2013): 1577-1594.

Hughes, Karen W., Ronald H. Petersen, and Edgar B. Lickey. "Using Heterozygosity to Estimate a Percentage DNA Sequence Similarity for Environmental Species' Delimitation Across Basidiomycete Fungi." New Phytologist 182, no. 4 (2009): 795-798.

Lickey, Edgar B., Shannon M. Tieken, Karen W. Hughes, and Ronald H. Petersen. "The Mushroom TWiG: A Marvelous Mycological Menagerie in the Mountains." Southeastern Naturalist 6, no. sp2 (2007): 73-82.

Petersen, Ronald H.. New World Botany: Columbus to Darwin. Ruggell, Liechtenstein: A.R.G. Gantner Verlag, 2001.

Johnson, J. E., and Ronald H. Petersen. "Mating Systems in Xeromphalina Species." Mycologia 89, no. 3 (1997): 393-399.

Petersen, Ronald H., and Scott A. Gordon. "Mating Systems in Hymenomycetes: New Reports and New Species." Mycologia 86, no. 6 (1994): 743-757.

Gordon, Scott A., Ronald H. Petersen, and Dennis E. Desjardin. "Mating Systems in Marasmiu: Additional Evidence to Support Sectional Consistency." Mycological Research 98, no. 2 (1994): 200-204.

Desjardin, Dennis E., Scott A. Gordon, and Ronald H. Petersen. "Observations on Two                        Rhizomorph-Forming Species of Marasmiellus." Mycological Research 97, no. 1 (1993): 111-122.

Petersen, Ronald H.. "Moses Ashley Curtis's 1839 Expedition into the North Carolina Mountains." Castanea 53, no. 2 (1988): 110-121.

Petersen, Ronald H.. Comments on the Fungi of the Spruce-Fir Forest of the Southern Appalachian Mountains In The Southern Appalachian Spruce-Fir Ecosystem: Its Biology and Threats. Gatlinburg, TN: Uplands Field Research Laboratory, 1984.

Petersen, Ronald H.. "Meigs Post." Appalachian Trailway News 42, no. 1 (1981): 5.

Petersen, Ronald H.. "Two Early Boundary Lines with the Cherokee Nation." Journal of Cherokee Studies 6, no. 1 (1981): 14-33.

Petersen, Ronald H.. Checklist of Fungi of the Great Smoky Mountains National Park In Management Report. Gatlinburg, TN: Uplands Field Reserach Laboratory, 1979.