238 MAGUIRE 



and its tributary the Caqueta as far as the sandstone Serra do Araracuara 

 (in Amazonian Colombia). 



The important collections of George Gardner, made over a period of five 

 years in the field, exceeded more than 7000 numbers. He traversed the interior 

 regions north of Rio de Janeiro and westward over the high plateaus of Goyaz 

 and Matto Grosso and across eastern Brazil to Aracaty, near the present-day 

 city of Fortaleza in the state of Ceara. 



Perhaps the largest of the earlier collections was made by Glaziou, who 

 over a period of thirty-five years obtained nearly 23,000 field numbers mostly 

 in eastern Brazil. 



Overwhelmingly the most important collections of Amazonian materials 

 were made by Richard Spruce during the fifteen years of his heroic explora- 

 tion of the Amazon River and its tributaries, the Trombetes, Negro, Uaupes, 

 Casiquiare, and Pacimoni Rivers, regions of the upper Orinoco in Venezuela, 

 and finally of Peru and Ecuador during the last nine years. His collections of 

 nearly 10,000 field numbers are widely distributed in the herbaria of the 

 world, of which 6544 numbers are of vascular plants. The first set of the 

 latter, studied by Bentham, is on deposit at Kew. Spruce made the taxo- 

 nomic study of his moss and liverwort collections. 



Since 1900 the outstanding figure in Amazonian botany has been Adolpho 

 Ducke. There is available at this time no detailed account of his long years 

 of exploration throughout the Amazon Basin, nor has a collation been made 

 of the numerous written contributions that he has made to the flora of Hylea. 

 It is unquestionably accurate to say that he has collected more plant material 

 of the finest quality from the Amazonian region than has any other man in 

 the entire history of American tropical botany. His important collections are 

 widely distributed in the world herbaria, the principal sets being at Rio de 

 Janeiro, Belem (in the Museu Goeldi and Instituto Agronomico do Norte), 

 Washington, and New York. At present, Ducke, in his eighty-first year, is 

 engaged in a field study of the flora of the state of Ceara. He is in residence 

 in the city of Fortaleza. 



For a number of years J. Huber, who died in 1914, was in charge of the 

 botanical collections at the Museu Goeldi at Belem. The most complete set of 

 his collections and the most complete set extant of the important Brazilian 

 collections of E. Ule, together with many of the earlier of A. Ducke and their 

 contemporaries of the period, are at the Museu Goeldi. 



P. F. von Luetzelberg in 1911 became head gardener at the botanical garden 

 in Rio de Janeiro. From there until 1922, serving with the Brazilian govern- 

 ment in various capacities, he traveled widely throughout eastern Brazil. By 

 1920 he had accumulated 12,000 herbarium specimens, which in 1922 he 

 took with him to Munich. On his return to Brazil in 1924, he continued in 

 government service, joining the frontier commission under General Rondon 

 in 1927. From 1927 until 1929, while on the frontier commission, he took part 



