Formal requests for material for sectioning must be submitted to the Collections Manager of the U.S. National Herbarium, Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560-0166, U.S.A. (telephone: (202)633-0943; fax: (202)786-2563; e-mail: USNH@si.edu).
Requests for additional information not found in the database should be directed to: Stanley Yankowski, Department of Botany, MRC-166, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560-0166, U.S.A. (telephone: (202)633- 0962; fax: (202)786-2563; e-mail: yankowss@si.edu).
