PAPERS GIVING RUSTS OF NORTH AMERICA. 187 



script works of Schweinitz and the letters (amounting to 237) from 

 his correspondents deposited at the Philadelphia Academy of Nat- 

 ural Sciences, the letters from Schweinitz to Torrey (35 in number) 

 at the New York Botanical Garden, and the letters from corre- 

 spondents in the possession-of his grandson, Dr. Geo. de Schweinitz, 

 of Philadelphia. 



Some of his biographers say that during the latter years of his 

 life he used dc in place of von in his name. It is quite certain that 

 after his death his sons and their families used the French form of 

 the name, as their descendants do at the present time. His cor- 

 respondents addressed him variously. By German friends and 

 many others the address used was Herr von Schzueinits, or by a 

 few of them Baron von Schzveinits, while a less number used de 

 Schweinita. His intimate American friends, Torrey and Darling- 

 ton, both of English descent, invariably used von. All of the 

 Schweinitz letters to Torrey at the N. Y. Bot. Garden are signed 

 Leivis D. V. Schzveinitc; they extend from June 24, 1820, to May 2, 

 1832. His published writings bear this form of his name on their 

 title pages, except when made to conform to the Latin. The initials 

 invariably used on his packets of fungi and other collections were 

 LvS. When used in print to indicate authorship they were written 

 L.v.S. In the North Carolina list the abbreviation was Szv. 



There were doubtless reasons why he might have favored a 

 change in the family name, either out of consideration for his wife, 

 who was of French ancestry, or because of his dislike to Prussia, 

 which at the Congress of Vienna in 181 5 had acquired a third of 

 Saxony, including that part where the ancestral home was situated 

 and where his youth had been passed. But it is quite probable that 

 he himself did not adopt the new form. 



The botanical work of Schweinitz w^as made the avocation of a 

 busy life largely devoted to religious duties and churchly service. He 

 was imbued, nevertheless, with the most thoroughly scientific spirit. 

 His monographic work upon the very difficult genera, Care.r, Viola, 

 and Sphccria, was of the highest order. He eschewed the easy as- 

 sumptions too rife in his day, and believed that a scrutiny of facts 

 outweighed all plausibilities. What may be designated as his scien- 

 tific creed is given in the preface to the Conspectus by Albertini & 



