(38) 
The twelve new herbarium cases referred to above have 
been used to take up the expansion necessary to relieve the 
congested condition of the herbarium and the space thus 
gained will accommodate a part of the miscellaneous 
accumulation of mounted herbarium specimens formerly 
held in storage. Certain space freed through the rearrange- 
ment of part of the general herbarium has given oppor- 
tunity to expand and rearrange the local herbarium and 
the herbarium of cultivated plants. 
The great number of unmounted herbarium specimens, 
accumulated as a result of lack of herbarium cases and 
assistants to mount them are being sorted into the natural 
plant families and genera so that any specimen there 
represented will be available for study in connection with 
the various lines of research being carried on by members 
of the Garden Staff. A great deal of very valuable and 
useful material would otherwise be inaccessible. 
Investigations and Assistance 
The curatorial work of the museum and herbarium has 
been cared for by the several curators and associate cura- 
tors, some of whom have also participated in or cared for 
various side issues and all of whom have followed, inci- 
dentally, some line or lines of investigation. 
Dr. P. A. Rydberg, Curator, continued in charge of the 
herbarium of flowering plants. In addition to the usual 
assorting and distribution of herbarium sheets, the task of 
assorting a large accumulation of herbarium material, 
transferring part of the general herbarium into the new 
cases, and readjusting the whole herbarium to the increased 
space as well as arranging the unmounted herbarium speci- 
mens fell to Dr. Rydberg’s lot. He also continued his 
taxonomic investigations and interpretations of the families 
Rosaceae, Fabaceae and Carduaceae for North American 
Flora. A monograph of Rosa is now in press. The tribe 
Psoraleae of the Fabaceae is ready for the press, and the 
manuscript of the tribe Senecioneae of the Carduaceae is 
