46 Plants Collected in Paraguay. 



written descriptions made by the collector in the field, or from 

 fresh specimens directly after reaching home. The observations 

 and measurements are entirely his own, none of them being drawn 

 from the works cited in the naming of the species, and they simply 

 record what he saw himself whether they conform exactly to the 

 published descriptions or not. 



The determinations of the genera and species are due principally 

 to Prof. N. L Britton, of Columbia College, who visited the Her- 

 baria at Kew, the British Museum, Paris, and Geneva in the sum- 

 mer of 1891, and compared such as could not be matched in the 

 Herbarium of Columbia with the vast collections stored in those 

 places. 



He was aided in his researches by such eminent European bota- 

 nists as J. G. Baker, Edmund Baker, A. Cogniaux, N. E. Brown, 

 M. T. Masters, A. Franchet, Casimir DeCandolle, and R. A. Rolfe, 

 who courteously named many of the plants belonging to genera in 

 which they are experts. 



Prof. Britton's descriptions of new species and occasional notes 

 bear his signature. 



In this joint work we have been greatly assisted by Miss Anna 

 Murray Yail, who has not only consulted many publications in the 

 attempt to identify the species, but also sorted out the plants, ar- 

 ranged them in systematic order, and devoted much time and labor 

 to preparing the labels and distributing the specimens to subscribers. 



So much care has been exercised in the identification of the spe- 

 cies, that we feel sure that the names are substantially correct. 



The nomenclature adopted is in accordance with the rules pro- 

 mulgated by the Botanical Club of the American Association for 

 the Advancement of Science at its recent meeting in Rochester, 

 New York. 



THOMAS MORONG. 



Columbia College, October 26, 1892. 



RANUNCULACEJE. 

 Clematis Brasiliana, D.C., Syst. i, 143. 



Near Asuncion (759); Pilcomayo River (1067). 

 A climbing vine with white and very fragrant flowers, much like 

 our C. Virginiana. The tails of the fruit are longer, plumose, and 



