Parasitic Finigi of IlIi)ioi.s. 159 



Farlow. and others) that the plant is not generically distinct 

 from Uronii/crs. This being admitted, a further question comes 

 upon the specific distinction between the American plant on 

 B/iifs and the European one on Fistacca^ an allied genus. Ours 

 was published in Raveuel's Fungi Car. Sup. (1855), under the 

 names of Uredo toxicodendri , Berk. & Rav., for the uredoform, 

 and Pileolaria hrevipes, Berk. & Rav., for the teleutoforni, and 

 the latter name has been commonly used, though the signifi- 

 cance of the specific appellation is unintelligible or incorrect, 

 for the pedicels are conspicuously long. Upon comparing 

 specimens and descriptions of European and American plants, 

 it does not appear that the latter can ))e maintained as a dis- 

 tinct species, hence the name previously given to the former 

 has here been adopted (Predo ferebiiitJii, D. C. Flore Franc. 

 [1815], VI, p. 71). The teleutospores are not at all different, 

 but in the poor specimens at hand of the European uredo- 

 spores, the spiral arrangement of the prominences cannot be so 

 well made out; however, Schroter (Hedwigia XIV. [1875], 

 p. 170) does not find any difference between them. Doubtless 

 there is none. 



It is peculiar that a difference of opinion should exist as to 

 which of the forms is the teleutospore. In these specimens the 

 yellowish fragile-stalked form appears alone in the collections 

 of July, in those of August this is well scattered but present, 

 while the thick-walled long-stalked form may be found in sori 

 still mostly covered by the epidermis, and later (October) only 

 this last is found. 



U. hedysari-paniculati, (rfchw.) Farlow. 



II., III. Spots yellow or none; sori amphigenous. scat- 

 tered over the whole under surface of the leaf, few above. II. 

 Sori small, yellowish brown, scattered; spores subglobose, 

 echinulate, 18 by 21 ix-. III. Sori small, compact, soon diffuse 

 and confluent, brown or blackish; spores acute or oval, obtuse, 

 conspicuously papillate, reddish ])rown, epispore thick, size 18 

 by 21;".; pedicels broad, slightly colored, slightly curved below, 

 twice the length of the spore. 



Sori minute, but thickly scattered over the whole leaf, innate witli 

 the epidermis. Spores long-pediceled, with the pedicels articulate, pel- 



