Studies of the Schweinitz Collections of Fungi 203 



lists of the inclosed genera and species on the outside. The 

 species are in small paper packets bearing Schweinitz's auto- 

 graph labels. These packets rarely bear the small numbers used 

 on his regular duplicates and were evidently taken in case no 

 number occurs from the original packet of the species. To dis- 

 tinguish this collection from the Schweinitz Herbarium later be- 

 queathed to the Academy, the writers will refer to this as the 

 " Collins collection." 



Brongniart 19 in a letter dated April 24, 1829, and Greville 19 in 

 a letter dated 1830, acknowledge the receipt of collections of 

 plants from Schweinitz. Brongniart speaks specifically of Cryp- 

 togams. These were in part at least fungi, as autograph speci- 

 mens of fungi from Schweinitz are found in the Brongniart her- 

 barium at Paris and in Greville's herbarium at Edinburgh. In a 

 letter dated 1830 Dr. Zeyher, director of the Botanic Garden at 

 Schwetzingen, acknowledges the receipt of specimens of fungi. 



In addition to the specimens listed above the senior writer 

 has examined autograph specimens of fungi in the following her- 

 baria : that of Kunze at Leipsic, of Jacquin at Vienna, of Link 

 and of Ehrenberg at Berlin, and of Nees von Essenbeck at Stras- 

 burg. 



Bureau of Plant Industry, 

 Washington, D. C. 



Literature Cited 



1. Adams, George. Essays on the Microscope. London, 1798. 



2. Albertini, J. B. de, and Schweinitz, L. D. de. Conspectus Fungorum 



in Lusatiae superioris agro Niskiensi crescentium e methodo Persoon- 

 iana. Leipsic, 1805. 



3. Arthur, J. C. The Interpretation of Schweinitzian and other Early 



Descriptions. American Naturalist 17: 77-78. Jan., 1883. 



4. [Gore, J. W.?] A sketch of the life and scientific work of Lewis David 



von Schweinitz. Journal of the Elisha Mitchell Scientific Society, 3 : 

 9-25. 1886. 



5. Harshberger, J. W. The Botanists of Philadelphia. Phila., 1899. 



6. Johnson, W. R. A Memoir of the late Lewis David von Schweinitz, 



P.D. Philadelphia, 1835. 



7. Kellerman, W. A. Sketch of de Schweinitz. Journal of Mycology, 2 : 



31-34. 1886. 



19 Letters to Schweinitz in the possession of Dr. George de Schweinitz of 

 Philadelphia. 



