Acknowledgments 



We acknowledge the contribution of compilers of lists of cultivated Ilex 

 over the past 250 years. Foremost recognition is due W. J. Bean, B. K. 

 Boom, W. Dallimore, E. Dilatush, S-Y. Hu, H. H. Hume, G. Krussmann, 

 L. E. T. Loesener, J. C. Loudon, P. Miller, T. Moore, W. Paul, A. Eehder, 

 W. Wheeler, E. C. White, and J. C. Wister. 



Special recognition is also due Harry William Dengler, former Exten- 

 sion Forester at the University of Maryland and Guest Editor of the Hand- 

 book of Hollies — 1957, who provided immense quantities of information 

 from his personal collection of Ilex literature. We are also deeply indebted 

 to Nellie Callaway, former Reference Librarian and Curator of the 

 Nursery and Seed Trade Catalogue Collection at the National Agricultural 

 Library, Beltsville, Md., for her fine assistance in referencing. 



We would also like to express our gratitude to H. T. Skinner, Director, 

 F. deVos, former Assistant Director, and, most of all, W. F. Kosar, former 

 Research Geneticist, all of the National Arboretum. 



Names in the trade are used in this publication solely for the pur- 

 pose of providing specific information. Mention of a name does not 

 constitute a guarantee or warranty of the product by the U.S. Depart- 

 ment of Agriculture or an endorsement by the Department over other 

 products not mentioned in the text or appendices or products inadver- 

 tently omitted. 



in 



