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Mr. Percy Wilson, Associate Curator, continued to 
devote his attention to the determination and distribution 
of various collections of West Indian plants. He has had 
the supervision of the lantern-slide and photographic 
negative collections; also of all photographic work. In 
addition to his duties as docent three afternoons each week, 
Mr. Wilson had the care of all extra visiting classes from 
various schools. As chairman of the field committee of 
the Torrey Botanical Club, he has arranged for all weekly 
field meetings of the Club, was personally present at most 
of the field excursions, and obtained in this way much 
valuable material illustrating the local flora. 
Dr. Francis W. Pennell, Associate Curator, in addition 
to general herbarium work, continued several lines of 
investigation commenced last year. For the study of the 
Scrophulariaceae he has typified all genera of the family, 
and has fully indexed, mostly with statement of type 
locality, the literature to original descriptions of American 
species. Nearly three months, from June 1 to August 25, 
he spent in field study of this family, mainly in the central 
Rocky Mountain region. Dr. Pennell has also continued 
the study of collections made in 1912 and 1913 in the 
southern states, and in connection with this revised the 
United States species of several genera of some complexity, 
Commelina, Schoenocaulon, Nemexia, Chamaecrista, and 
Crotonopsis. 
Miss Margaret Slosson, Assistant Curator, cared for the 
fern herbarium during the year and continued exchanges 
with the herbaria of Prince Roland Bonaparte, by means 
of which rare ferns and Mexican flowering plants were 
added to the collections. She began a series of papers as 
the result of studies on the Hymenophyllaceae, the first 
appearing during the year and two others being nearly 
ready for publication, and she practically completed a check 
list of the fern flora of Porto Rico, listing the distribution of 
the species. Miss Slosson also read a paper on the “Value 
of Leaf-hairs in Determining Fern Species” at one of the 
