(32) 
Specimens received for the Columbia University her- 
barium were mounted and distributed in the cases. 
Investigations and Assistance 
A brief record is here made of some of the activities of 
the members of the curatorial staff, in addition to their 
regular herbarium work. 
Dr. P. A. Rydberg, Curator, continued in charge of the 
collection of flowering plants. He completed the manu- 
script of monographs of the families Lennoaceae, Pyrola- 
ceae, and Ambrosiaceae begun last year. The first and 
second of these families have been published in North Amer- 
ican Flora. Work on the large family Rosaceae, which was 
in course of preparation and publication for the past several 
years, was completed, and the last part is now ready to 
print. Early in the year, Dr. Rydberg began a study of the 
family Carduaceae, and descriptions of a part of this family 
have been completed and have been published in North 
American Flora. Investigations on the above groups of 
plants, supplementary to those carried on at the Garden, 
were prosecuted at the herbarium of Harvard University 
and at the National Museum. Dr. Rydberg published two 
papers dealing with the flora of the Rocky Mountains and 
two on species of the family Rosaceae. He delivered one 
lecture in the Garden lecture course. 
Dr. Marshall A. Howe, Curator, continued to devote his 
attention to the collections of algae and hepaticae. He 
concluded a study of and published a report on an ex- 
tensive collection of marine algae from Peru,* this publi- 
cation being partly paid for by a grant from the Peruvian 
Government. He also printed, exclusive of reviews, two 
papers on North American algae. The results of an in- 
vestigation of fossil calcareous algae from the Panama Canal 
Zone remain unpublished. Following the annual meetings 
of the American Association for the Advancement of 
Science and of the Botanical Society of America, held in 
* Memoir 15 of the Torrey Botanical Club. 
