The M. A. Howe herbarium, comprising representatives 

 of all the larger groups of plants, particularly from western 

 North America, but especially rich in the bryophytes of the 

 Pacific slope, is an important addition to the collections. 



Mounting and Conserving of Specimens. Selections 

 from our stock of unmounted herbarium specimens and 

 from the accumulation of the year, amounting to about 

 26,000 specimens, were mounted on 20,204 sheets of 

 herbarium paper, and incorporated in the permanent collec- 

 tions. The herbarium sheets of the groups monographed 

 in the current parts of "North American Flora" have been 

 named in accordance with the nomenclature adopted in that 

 work, and the specimens properly arranged in the herbarium 



Garden Herbarium. The unequal growth and the 

 rapid increase of this collection necessitated the general 

 shifting of specimens several times during the year. The 

 installation of several new herbarium cases toward the end 

 of the year also necessitated the rearrangement of many 

 plant families. 



Columbia University Herbarium. Several hundred 

 sheets of both flowerless and flowering plants were mounted 

 and incorporated in this collection. Many old specimens 

 were repaired, and those of groups being used in connec- 

 tion with work on "North American Flora" were securely 

 attached to the herbarium sheets. 



Duplicate Herbarium Specimens. A total of 3,773 

 specimens were sent to institutions and individuals in ex- 

 change for other specimens. 



Assistance and Investigations 



Dr. Arthur Hollick, Curator, has had charge of the care 

 and development of the fossil plant collection. In addition 

 to arranging the public exhibits, Dr. Hollick has continued 

 his studies of previously unnamed specimens, and developed 

 the catalogue of the many figured and type specimens of the 

 collection. In this work he has had the voluntary assist- 

 ance of Mr. Edwin W. Humphreys. 



