International Checklist 



of Cultivated Ilex 



Parti 



Ilex opaca 



By G. K. Eisenbeiss, research horticulturist, and T. R. Dudley, research ootanist, 

 Plant Science Research Division, Agricultural Research Service 



Introduction 



This checklist is the result of a thorough search and analysis of names 

 and pertinent data in commercial, horticultural, and botanical literature. 

 Although the checklist is based primarily on literature sources, authentic 

 living materials and herbarium specimens were examined. Documentation 

 of cultivar names has been as complete as possible and provides a sound 

 basis of rank and validity of these names. We encourage users to com- 

 municate errors or omissions noted to the attention of the Holly Society 

 Checklist Committee. The literature relating to cultivated Ilex is exten- 

 sive and appears in numerous languages. The quantity consulted for 

 preparation of this checklist is considered sufficient for critical analysis of 

 most of the known cultivars. The two most significant sources for the 

 checklist have been the nursery and seed trade catalogue collection, con- 

 sisting of more than 250,000 items, at the National Agricultural Library, 

 Beltsville, Maryland, and the lists of cultivated plants prepared by 

 Arboreta and Botanic Gardens throughout the United States and Europe. 

 Considerable thanks are due to Robert B. Clark, presently at Monroe 

 County Park Commission, Rochester, New York, for his intensive extract- 

 ing of the nursery and seed trade catalogue collection at the Bailey 

 Hortorium. 



This checklist is international. All known Ilex opaca introductions in 

 cultivation are reported. Much pertinent foreign literature has been re- 

 viewed. This fact will become particularly apparent in subsequent parts 

 of the checklist, currently being prepared, in which some descriptions will 

 be given for the first time in the English language. 



463-011 O - 73 - 2 



