Identification of plant specimens for agricultural scientists at University of Georgia, Athens, Griffin, Tifton campuses; 2000-present
Contributed family descriptions to DeFelice, M.S., C.T. Bryson, A.W. Evans and K.L. DeFelice. 2004. Interactive Encyclopedia of North American Weeds, DVD-ROM, Version 3.0. Southern Weed Science Society, Champaign, Illinois.
Contributed photographs for CD-ROM by Bargeron, C.T., D.J. Moorhead, G.K. Douce, R.C. Reardon and A.E. Miller. 2003. Invasive Plants of the Southeastern United States: Identification and Control. USDA Forest Service FHTET-2003-08. November 2003
Contributed photographs to Forestry Images: The Source for Forest Health, Natural Resources and Silviculture Images and IPM Images: The Source for Agricultural Images joint project between the Bugwood Network (University of Georgia) and US Forest Service and the NSF Center for Integrated Pest Management, Image Archive and Database, University of Georgia. http://www.forestryimages.org and http://www.ipmimages.org/
Peer-reviewer for the following journals: Brittonia, Castanea, Georgia Journal of Science, Monographs in Systematic Botany, Novon, Phytologia, Rhodora, Sida, Systematic Botany, Tipularia, Weed Technology
Peer-reviewer for United States Department of Agriculture, Agricultural Research Service
Book reviewer for: Benjamin Cummings Publisher, San Francisco, California; Menasha Ridge Press, Birmingham, Alabama
Member of Doctoral Dissertation Committee, Department of Range Science & Ecology, Texas A&M University; 2003-2006
Regional Reviewer, Flora of North America; 2006-present
Led botanical forays at Reed Bingham State Park, Adel, Georgia
Led field trips for Georgia Botanical Society and organized field trips for Georgia Botanical Society Annual Spring Wildflower Pilgrimage held in Valdosta; 17-19 April 1998
Member, Local Arrangements Committee for Georgia Academy of Science Annual Meeting in Valdosta; 1989.
Secretary-Treasurer, Southeastern Section of Botanical Society of America; 1992-1993
Member, Editorial Board of Castanea, Journal of the Southern Appalachian Botanical Club; 1991-1994