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Great Smoky Mountains Video Sampler. Great Smoky Mountains Association, 2012.
Three New Species of Acanthostigma (Tubeufiaceae, Dothideomycetes) from Great Smoky Mountains National Park." Mycologia 102, no. 3 (2010): 574-587.
"The Calicioid Lichens and Fungi of Great Smoky Mountains N.P.. Fort Kent, Maine: University of Maine , 2009.
Using Heterozygosity to Estimate a Percentage DNA Sequence Similarity for Environmental Species' Delimitation Across Basidiomycete Fungi." New Phytologist 182, no. 4 (2009): 795-798.
"Leaf Phenology in Relation to Canopy Closure in Southern Appalachian trees." American Journal of Botany 95, no. 11 (2008): 1395-1407.
"Plants and the Cherokee. Great Smoky Mountains Association, 2004.
Plants of the Cherokee: Medicinal, Edible, and Useful Plants of the Eastern Cherokee. Gatlinburg, TN: Great Smoky Mountains Association, 2004.
Mountain Kitchen: Uses of Wild Edible & Medicinal Plants in the Southern Appalachians. Great Smoky Mountains Association, 2002.
Deciduous Forests of Eastern North America. Blackburn Press, 2001.
New World Botany: Columbus to Darwin. Ruggell, Liechtenstein: A.R.G. Gantner Verlag, 2001.
Wild Edibles & Medicinals of Southern Appalachia: Autumn Series. Ironwood Productions, 2001.
Vascular Plants of the Great Smoky Mountains: A Checklist for the Vascular Plants of Great Smoky Mountains National Park. Great Smoky Mountains Natural History Association, 2000.
An Annotated Bibliography on Southeastern American Botanical Explorers Prior to 1821. Chapel Hill, NC: University of North Carolina at Chapel Hill, 1999.
Habitat Modeling and Protection of American Ginseng (Panax quinquefolius L.) in Great Smoky Mountains National Park. Gatlinburg, TN: U.S. National Park Service, 1999.
Vegetation of the Great Smoky Mountains National Park, 1935-1938." Castanea 63, no. 3 (1998): 323-336.
"Wild Edibles & Medicinals of Southern Appalachia: Summer Series. Ironwood Productions, 1997.
The Impact of Harvesting Ramps (Allium Tricoccum Ait.) In Great Smoky Mountains National Park. Gatlinburg, TN: National Park Service, 1996.
Allozyme Variation in Two Great Smoky Mountain Endemics: Cacalia rugelia and Glyceria nubigena." Journal of Heredity 86, no. 3 (1995): 195-197.
"Allozyme Variation in Two Great Smoky Mountain Endemics: Cacalia rugelia and Glyceria nubigena., 1993.
Bryophytes of Sinks Area, Great Smoky Mountains National Park In Final Report. Gatlinburg, Tennessee: Great Smoky Mountain National Park, 1993.
Stones of Remembrance." Smoky Mountain Historical Society Newsletter 18, no. 4 (1992): 3-8.
"Bertram Whittier Wells (1884-1978): A Study in the History of North American Plant Ecology." American Journal of Botany 73, no. 7 (1986): 1058-1078.
"The Economic Botany of Vascular Plants Found in Southern Appalachia In Biology. Cookeville: Tennesse Technological University, 1985.
Gap and Stand Dynamics of a Southern Appalachian Spruce-Fir Forest In Botany. Vol. Doctor of Philosophy. Knoxville, Tenn.: The University of Tennessee, 1985.
Primary Productivity and Spatial Structure of Phytolithic Growth in Streams in the Great Smoky Mountains National Park, Tennessee." Hydrobiologia 123, no. 1 (1985): 59-67.
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