90 REPORT OF NATIONAL MUSEUM, 1&19. 



in the general herbarium has included the identification of several 

 thousand Mexican phanerogams by Mr. P. C. Standley, the assistant 

 curator, in connection with his study of the trees and shrubs of 

 Mexico. 



The associate curator, Mr. William R. Maxon, again calls atten- 

 tion to the crowded condition of the herbarium and the difficulty of 

 making provision for normal increase. Cases actually required have 

 been installed temporarily, but at a sacrifice of table space which is 

 badly needed. A small amount of space can be released by the dis- 

 tribution of duplicates, but this would require additional clerical 

 assistants. Real relief can only be had by providing a balcony in 

 the west half of the herbarium as previously suggested and hope is 

 expressed that it may be possible to have one constructed at an early 

 date. The sectional library has been extended and completely rear- 

 ranged during the latter part of the year. The work, in charge of 

 Mr. Brockett, involved the deposit of many volumes received from 

 the Biltmore Herbarium and of others selected from the Museum 

 library. 



The curator, Mr. Frederick V. Coville, continued his studies of 

 Vacdniimi and related genera, making use of material in the Na- 

 tional Herbarium as in previous years. Dr. J. N. Rose, associate 

 curator, since his return from the expedition to Ecuador in October, 

 1918, continued his studies of the Cactaceae in collaboration with Dr. 

 N. L. Britton, director in chief of the New York Botanical Garden. 

 The first volume of The Cactaceae has recently been published by 

 the Carnegie Institution, under whose auspices the work has been 

 done, and the second volume is in proof. Mr. Maxon continued his 

 studies of the North American ferns and has published several 

 l^apers. He has begim the preparation of a catalogue of the pteri- 

 dophji;a of Cuba. Mr. Standley carried forward his work upon the 

 Rubiaceae and has submitted manuscript for part 2 to be published 

 in the North American Flora, i^art 1 having been issued during the 

 year. He also submitted the first part of a synoptical account of the 

 trees and shrubs of Mexico, and completed Studies of Tropical 

 American Phanerogams, No. 3, which will appear shortly. 



During the year the herbarium has been consulted frequently, as 

 in previous years, by members of the staff of the Department of 

 Agriculture. Among the botanists from other cities who have 

 worked in the herbarium during the year are the following: Prof. 

 C. S. Sargent and Dr. Camillo Schneider, of the Arnold Arboretum, 

 Jamaica Plain, Massachusetts; Prof. W. W. Rowlee, of Cornell 

 University, Ithaca, New York; Dr. J. K. Small, Dr. P. A. Rydberg, 

 and Dr. H. A. Gleason, of the New York Botanical Garden, Bronx 

 Park, New York City; and Dr. J. M. Greenman, of the Missouri 



