MISSOURI BOTANICAL GARDEN BULLETIN 19 
suite of Missouri plants, and the specimens are accompanied 
by full and careful notes. Moreover, it represents the work 
of Mr. Letterman covering a period of nearly forty years, 
during which time he not only made extensive collections 
in Missouri, but also collected personally in Arkansas, Colo- 
tado, Idaho, Kansas, New Jersey, Oklahoma, Pennsylvania, 
Texas and gare = Mr. Letterman carried on a large 
correspondence and freely exchanged plants with contempo- 
raries, so that his herbarium includes some series of exsiccatae 
from noted collectors, such as Curtis, Hasse, Macoun, Pal- 
mer, Parish, Rusby, Sandberg, Small, Swan and Vasey. 
Much of this material will be of value for exchange pur- 
poses. A second valuable collection for the Garden is the 
private herbarium of Dr. J. M. Greenman, which was 
acquired by gift. The collection contains upwards of 10,000 
specimens from New Hampshire, Vermont, Massachusetts, 
Rhode Island, Connecticut, New York, Pennsylvania, New 
Jersey, Ohio, Michigan, Indiana, Illinois and Wisconsin. 
The plants were collected during the years 1890 to 1902 and 
in many cases are duplicated in the Gray Herbarium by 
specimens which have been cited in botanical literature, par- 
ticularly in Rhodora, in the course of recent intensive studies 
of the New England flora. 
Other important accessions have been obtained by gift, 
exchange and purchase. Among the more eoteworiliy are 
the following: Bartholomew’s “Fungi Columbiani’ and 
“North American Uredinales,” Broadway’s plants of Tobago 
(W. I.), Buchtien’s plants of Bolivia, Bush’s plants of Mis- 
souri, Carr’s “Phanerogams of Northwestern South Dakota,” 
Chandler’s plants of Texas, Clokey’s plants of Illinois, Sas- 
katchewan and Mexico; Greenman’s plants of Arizona, 
Haynes’ “North American Hepaticeae,” Holzinger’s “N. A. 
Mosses,” Krieger’s “Fungi Saxonici,’” Macoun’s plants of 
Canada, Nelson’s plants of Idaho, Utah, Colorado and 
Nevada, Nieuwland’s plants of Indiana, Orcutt’s plants of 
Texas and Mexico, Pennell’s Scrophulariaceae of the Atlantic 
and gulf coastal-plane, Purpus’ plants of Mexico, Tilden’s 
lants of the South Pacific Islands, Visher’s plants of South 
akota, von Schrenk’s plants of the United States, Zenker’s 
plants of Kamerun, and numerous smaller accessions 
recorded in the Missouri Botanical Garden Bulletin. 
Organization of Old Material and i ae organ- 
ization, namely labeling and laying out in duplicate sets, of 
the miscellaneous unmounted specimens secured on acces- 
sions in former years, has be, eas as rapidly as the time 
and assistance would permit. private herbarium of the 
