622 PKOCEEDINGS OF THE AMERICAN ACADEMY. 



any other variations, and to relegate to the rank of varieties and 

 forms, under species into which they converge, plants of less numerous 

 or significant characters. 



The nomenclature of the revision is strictly in accordance with the 

 Vienna Rules. 



To Dr. R. Chodat, of Geneva, Drs. C. F. Millspaugh and J. M. Green- 

 man, of the Field Museum of Natural History, Dr. J. N. Rose, of the 

 United States National Museum, Capt. J. D. Smith, of Baltimore, and 

 Prof William Trelease, of the Missouri Botanical Garden and Henry 

 Shaw School of Botany, I desire to express my gratitude for their kind 

 loan of valuable specimens. To Dr. N. L. Britton, of the New York 

 Botanical Garden, and his associates, I owe special thanks for the 

 courteous reception afforded me, and for permission to consult the fine 

 herbaria of the Garden and of Columbia University. For photographs 

 of type specimens important to the work, I am indebted to B. Daydon 

 Jackson, Esq., Secretary of the Linnean Society, and Prof. F. 0. 

 Bower, of the University of Glasgow. Dr. Casimir de Candolle, of 

 Geneva, Prof. A. Engler, of the Royal Botanical Garden in Berlin, 

 Lieut. -Col. David Prain, F.L.S., F.R.S.E., of the Royal Gardens at 

 Kew, and Dr. A. Zahlbruckner, of the Imperial Museum of Natural 

 History in Vienna, were so kind as to contribute excellent tracings, 

 drawings, and photographs. Dr. Otto Kuntze, of San Remo, Italy, 

 and Alfred J. Swart, Esq., of the Victorian Department of Agri- 

 culture, Victoria, Australia, kindly contributed valuable authentic 

 specimens. I wish to thank Dr. H. Pittier, of the Bureau of Plant 

 Industry, Department of Agriculture, and Dr. H. H. Rusby, of the 

 New York College of Pharmacy, for useful information in regard to 

 geographical matters. I wish to express my special thanks also to 

 the librarian of the Gray Herbarium, Miss Mary A. Day, for her 

 untiring efforts in connection with the bibliographical work and for 

 much other valuable assistance and advice. To Miss I. W. Anderson, 

 of the Gray Herbarium, I am greatly indebted for assistance in pre- 

 paring the material for study. Prof. M. L. Fernald and Mr. H. H. 

 Bartlett, of the Gray Herbarium, have also given many useful sug- 

 gestions, for which I wish to thank them very much. But above all 

 I am indebted to the Curator, Dr. B. L. Robinson, for his constant 

 advice and assistance throughout the work. 



Revisio Generis Spilantiiis. 



Spilanthes Jacq. Plantae inter erectas et prostratas variantes her- 

 baceae 6-15 dm. altae. Folia opposita inter sessilia et valde petiolata 

 variantia. Capitula discoidea vel radiata (sed radiis saepius parvis) 



