240 MAGUIRE 



Third Expedition, 1931-1932; collection numbers 1700-2024; Rio Tapajoz, 

 Edo. Para, Rio Solimoes, Edo. Amazonas, and Rio Madeira, Edos. Ama- 

 zonas and Matto Grosso. Froes under Krukoff's direction in 1932-1933 

 collected in the Basin of the Rio Maracassume, Maranhao. 



Fourth Expedition, 1933; collection numbers 2228-5959; basins of the Rios 

 Grajahu and Tocantins, Edos. Maranhao and Goyaz; the Rios Purus, 

 Ituri, and Jurua, Edo. Amazonas and Terr. Acre. 



Fifth Expedition, 1934-1935; collection numbers 6034-7314; Rio Madeira, 

 Edo. Amazonas. 



Sixth Expedition, 1935-1936; collection numbers 7501-7910; Edos. Ama- 

 zonas and Para. 



Seventh Expedition, 1936-1937; collection numbers 7911-9124; basins of the 

 Rios Negro and Solimoes, Edo. Amazonas. 



Eighth Expedition, 1939; collection numbers 10,001-11,805; Bolivia. 



For the last two decades botanists at the Instituto Agronomico do Norte 

 at Belem, under the direction of J. Murga Pires, have undertaken extensive 

 exploration throughout the Amazon Basin. During the period 1945-1947, 

 Pires (with G. A. Black) assembled 1668 collection numbers in the Amazon 

 Basin from Belem to Iquitos in Peru. In subsequent years he has continued 

 his field work independently and with his colleagues, extending his work as 

 far as the upper Rio Negro. George A. Black, 1946-1955, particularly in the 

 states of Para, Ceara, Amazonas, and the territories of Amapa, Rio Branco, 

 and Guapore, has collected 18,817 numbers. In Brazil he has collected also 

 in the states of Maranhao, Sao Paulo, Minas Gerais, Rio de Janeiro, and 

 Bahia. In addition, he has collected in Colombia, Peru, Bolivia, Ecuador, 

 French Guiana, Argentina, Mexico, and the United States. The original sets 

 are at the Instituto in Belem; duplicate material is largely at New York and 

 Washington. 



R. L. Froes from 1942 to 1953 collected 10,732 numbers principally as fol- 

 lows: the states of Amazonas, Para, Bahia, Maranhao, and the territories of 

 Rio Branco and Amapa. The original sets are at the Instituto; dupHcates are 

 at New York, Washington, and elsewhere. 



Consideration of botanists of southern Brazil would perhaps better be rele- 

 gated to a final section. But, that lacking, some brief comments are made 

 here. 



Contemporaneous with Ducke, two other luminaries over a period of nearly 

 five decades, but with their center of operation in southern Brazil, have con- 

 tributed much to the field botany of the country. J. G. Kuhlmann terminated 

 his long career as director of the Botanical Garden at Rio de Janeiro; F. C. 

 Hoehne as director at Sao Paulo. 



Hoehne served as botanist on a number of the expeditions of the frontier 

 commission in the Amazon Valley led by Brazil's most famous field geogra- 



