Studies of the Schweinitz Collections of Fungi 201 



with Nuttall to get western Cryptogams ; X1 also of " making a 

 journey to Muskingum [Ohio] in July;" 12 and of a trip to Lake 

 Erie lasting for a month. 13 



Specimens of Fungi Distributed by Schweinitz 



From the letter to Torrey quoted above (p. — ) it is apparent 

 that Schweinitz on his visit to Europe in 1817-1818, left with 

 Schwaegrichen specimens of all new species of fungi which he 

 had described up to that time. Thus far it has been impossible 

 to locate this collection although the senior author has made a 

 careful search in the principal herbaria of Europe. The only 

 Schweinitzian specimens known to have come from Schwaegri- 

 chen's Herbarium are a few which were found in Kunze's col- 

 lection in the Herbarium of the University of Leipsic and a single 

 specimen, which had apparently been sent to Nees von Esenbeck, 

 in the Herbarium at Strasburg. 



From the same letter it is also evident that Schweinitz began 

 at least as early as 1820 the systematic preparation of duplicates 

 for distribution. His method of preparing these duplicates is 

 evident from the original packets preserved in the Philadelphia 

 Academy of Sciences. In some cases there are two or three 

 small packets labeled the same as the larger packet except that 

 they bear the numbers 1, 2, 3, etc. For example " Sphaeria Cas- 

 tanea L. v. S. Beth. & Sal " is on one packet, and on a smaller 

 packet " Sph. Castanea L. v. S. 3." In Kunze's herbarium at 

 Leipsic and in the Link herbarium at Berlin, at Kew, at Upsala, 

 and elsewhere, are autograph specimens of Schweinitz which bear 

 these small numbers. 



Throughout Schweinitz's life an active exchange of specimens 

 was carried on between himself and Torrey. 14 Later Torrey pre- 

 sented to Berkeley and Curtis the fungi given him by Schweinitz. 

 Part of this collection is now in Berkeley's herbarium at Kew, 

 and part in the Curtis herbarium at Harvard. 



Schweinitz doubtless sent collections of fungi to some of his 



n Letter dated Jan. u, 1821. 



12 Letter dated May 25, 1823. 



13 Letter dated Dec. 5, 1827. 



14 Several letters from Schweinitz to Torrey. 



