§22 PROCEEDINGS 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.LS., 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. 
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. 
Revisto Generis Sprianruis. 
SpmLanTues 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) 
