Citation

USDA 1994: United States Department of Agriculture, Agricultural Research Service, National Genetic Resources Program. Germplasm Resources Information Network (GRIN) [online database]. Hamamelis virginiana L. National Germplasm Resources Laboratory, Beltsville (MD). [Accessed 4 June 2008]. Available from: http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl