Foreword 



Acknowledgments 



The herbarium of the U. S. National Arboretum is 

 one of the few major herbaria to emphasize 

 cultivated plants together with their wild progeni- 

 tors. Its specimens support scientific research 

 on these plants not only within the Department 

 of Agriculture but also worldwide through a loan 

 program. The ongoing work of the herbarium 

 staff in addressing problems in plant taxonomy 

 and nomenclature assists researchers, 

 germplasm conservators, and others in plant 

 identification and contributes to the efforts of 

 nurseries to identify correctly the plant material 

 they propagate and sell. 



A Catalog of Cultivated Woody Plants of the 

 Southeastern United States represents the culmi- 

 nation of more than 20 years of field work begun 

 in 1967 that covers 13 southeastern states and 

 the District of Columbia. The catalog has been 

 prepared as a reference guide for nurseries, 

 landscape architects, horticulturists, botanical 

 and horticultural libraries, botanists, extension 

 agents, educators, germplasm conservators, 

 botanical gardens and arboreta, propagators, 

 students, various units of the U.S. Department of 

 Agriculture, plant societies, and the gardening 

 public. It will be useful not only in the south- 

 eastern states, but also in other parts of the 

 United States where many of the plants listed 

 can be found in cultivation. 



The catalog is based on more than 14,000 docu- 

 mented voucher specimens critically reviewed for 

 correctness of identification and nomenclature. 

 With about 5,000 entries, both botanical names 

 and cultivar names, the catalog is a comprehen- 

 sive enumeration of woody plants cultivated in 

 the southeastern United States. 



The catalog is unique, being based wholly on 

 documented material deposited in the U. S. 

 National Arboretum herbarium and including a 

 guide to sites where collections were made of 

 plants growing in cultivation. It is hoped that the 

 catalog will, by example, encourage similar 

 documentation of the woody landscape plants in 

 other areas of the country and the deposit in 

 appropriate herbaria of voucher specimens 

 collected for permanent reference. 



Many individuals, too numerous to mention, 

 generously facilitated our collection efforts at 

 botanical gardens and arboreta, experiment 

 stations, college campuses, nurseries, and 

 private gardens. 



We specifically acknowledge the invaluable 

 assistance of the following specialists for their 

 help in identifying plant specimens: W.A. Ander- 

 son (Malpighiaceae), George Argus (Salix), Helen 

 L. Blake (old roses), Barbara Briggs (Callistemon) , 

 C.E. Codd (Carissa macrocarpa), David W. Hall 

 (miscellaneous Florida plants), James W. Hardin, 

 Jr. (Aesculus), Elizabeth McClintock (Hydrangea 

 and Myrtaceae) , A. Edward Murray, Jr. (Acer), 

 Eliane Norman (Buddleja), J.B. Phipps 

 (Crataegus), the late Sigmund Solymosy (miscel- 

 laneous Douisiana plants), and Charles A. Walker 

 (old roses). T. R. Dudley contributed many 

 voucher specimens cited in the catalog and 

 compiled the lists of Ilex and Caprifoliaceae. 



We express appreciation to the Friends of the 

 National Arboretum (FONA) and to the Southern 

 Nurserymen's Association for financial support 

 that greatly enhanced our ability to collect speci- 

 mens in the southeastern United States. 



We also thank Carol A. Rahbar and Franziska 

 Walczak as volunteer collaborators for their 

 substantive assistance in coordinating data 

 related to the computer data base, the list of site 

 acronyms, and attending to many other details 

 that contributed enormously to the accuracy of 

 the catalog. 



The authors are grateful for the privilege of using 

 artwork by the late Lillian Nicholson Meyer, 

 Susan M. Johnston, and Peggy K. Duke. 



Allan K. Stoner 



Acting Director, U.S. National Arboretum 



vn 



