Dr. Earl E. Sherff, Research Associate in Systematic Botany, 

 identified large consignments of Hawaiian and Mexican plants and 

 published a paper (see page 106). During the year he made two 

 trips through the Upper Peninsula of Michigan to study local flora. 

 Dr. Margery C. Carlson, Associate in Botany, continued her study of 

 Central American Loranthaceae before leaving in September for an 

 extended tour of Europe. 



Dr. Theodor Just, Chief Curator of Botany, continued his synop- 

 tical studies of gymnosperms and comparative studies of modern 

 and fossil angiosperm pollen. In addition he prepared for publica- 

 tion a bibliography of American paleobotany (1953-57), in which 

 work he was aided by Miss Mary-Ann Baugh, student assistant. 

 Several papers dealing with various aspects of paleobotany were 

 completed by the end of the year and now await publication in 

 several American scientific journals. 



Before his resignation Dr. Francis Drouet, Curator of the Crypto- 

 gamic Herbarium, continued research on blue-green algae. Dr. 

 Hanford Tiffany, Research Associate, conducted research in the 

 taxonomy of the Oedogoniaceae and published a revised edition of 

 his eminently readable book. Algae, The Grass of Many Waters. 



Dr. John W. Thieret, Curator of Economic Botany, continued 

 his studies of various tropical American Scrophulariaceae and 

 temperate and subarctic Gramineae. Preparation of entries on the 

 Scrophulariaceae for the Index Nominum Genericorum and the treat- 

 ment of this family for the Catalogo e Estatistica dos G^neros Faneri- 

 gdmicos were also continued. Accompanied by Chester F. Hansen, 

 a member of the faculty of York Community High School in Elm- 

 hurst, Illinois, he conducted a field trip to the northern Great Plains 

 of the United States and Canada in July and August (see page 40). 

 There special attention was given to the study and collection of 

 grasses, and a week was spent at Ft. Providence, Northwest Terri- 

 tories, Canada, on the Mackenzie River west of Great Slave Lake, 

 in studies of grassland vegetation. A brief trip along the shores of 

 Lake Michigan and Lake Huron was taken in September to make 

 mass-collections of Calamovilfa longifolia to supplement those made 

 in the Great Plains. 



Miss Edith M. Vincent, Research Librarian, prepared indices for 

 various volumes of Museum botanical publications. She added 

 numerous references to current botanical literature to the unpub- 

 lished parts of the Flora of Guatemala (Standley and Steyermark). 

 In addition to her regular duties she assisted many correspondents 

 by finding and sending to them descriptions of and information about 

 various plants. 



54 



