PAPERS GIVING RUSTS OF NORTH AMERICA. 201 



*2836. 26. C. U. Filicum, Lk. n. loi, on Aspidium, from New York, com- 

 municated by Dr. Torrey. 



Represented by about 4 cm. of the terminal part of a frond, 

 mounted, and by parts of one or more fronds of uniform appear- 

 ance in the original packet, which is labelled " Cseoma Filicum 

 Torrey Nyk in Asp. obtus," and in addition " U. polymorph in Asp. 

 dryopt.," with a number of German localities and names of German 

 collectors. Probably the additions to the inscription on the packet 

 do not indicate collections, but only memoranda. 



The rust occurs in rather large, covered, blistery sori, on the 

 under surface of the fronds, and is the uredinial stage of Hyalopsora 

 Aspidiotus (Peck) Magn. The host is evidently Phcgopteris 

 Dryopteris (L.) Fee, the Aspidium obtusum of Muhlenberg's 

 " Catalogue," and the collection was probably made in the Catskill 

 mountains, as Dr. Torrey lived for a time at West Point, N. Y. 

 The rust is not known outside of North America. It is a moun- 

 tainous form, the type collection being found by Peck in the Catskill 

 mountains. 



*2837. 27. C. U. Teucrii, L.v.S., very rare on leaves of Teucrium virginicum, 

 Bethlehem. 

 C. spots obsolete. Sori densely crowded into semblance of a spot, 

 eiifused, beautifully red. Spores very small, very red, almost 

 scarlet. 



Represented by one leaf, oblong, 3.5 by 7 cm., mounted, and by 

 the empty packet, labelled inside " Uredo Teucrii in fol Teucrii 

 canadens. Salem," and outside " Caeoma (Ured) Teucrii LvS. Naz." 

 The leaf shows a number of rusty-looking spots, still finely purplish 

 red, which the microscope reveals to be due to a Hyphomycetous 

 fungus, having small oblong to linear-oblong spores, and in nowise 

 related to the rusts, of which there are none known on Tciicrimn 

 in America. 



This material has been examined by Dr. C. L. Shear, who states 

 that it is identical with Cercospora racemosa E. & M., a species 

 founded upon a collection made by the senior author in Iowa, Sep- 

 tember 27, 1882. It is a somewhat common fungus extending from 

 the Atlantic coast to Kansas and Nebraska. The name should be- 



