204 Illinois Staff Laboratory of Natural History. 



20, 1165, II., III., Aug. 23, 1239, II.. III.; Lake, Aug. 27. 1349; 

 Lee, Sept. 8, 5720, II., III.: JoDaviess, Sept. 16, 5958, II.. III.; 

 LaSalle, Sept. 28, 6216, II., III.; Fulton, Oct. 1, 1765. 



This is Pnccinia Sorghi, Schw. (N. A. Fungi [1834]. 

 p. 295). The above name was published in 1815 (see Rabh. 

 Krypt. Fl. I. p. 181). 



PHRAGMIDIUM, LINK. 



Teleutospores divided by two or more horizontal sepia, 

 producing three or more cells in a single vertical row; teleuto- 

 sori prominent, usually small, tufted, sometimes confluent in 

 patches; uredospores one-celled, borne on deciduous pedicels; 

 aecidiospores produced in vertical chains as in the true ^Ecidia. 

 but without pseudoperidium; uredosori and aecidiosori sur- 

 rounded by a thick row of club shaped, or more or less capitate, 

 incurved paraphyses. 



All the sporef orrns of the Phntymidia are ordinarily hypo- 

 phyllous, the secidium and uredo appearing rather early in 

 summer, and the teleutoform after the first of July; but the 

 two latter are very commonly found together during the later 

 parts of the season. Sometimes the fungi are seated upon the 

 petioles and stems of the host. All grow upon species of 

 Rosacece, and so far as discovered, upon plants of the genera 

 Poteniilla, Rubus and Rosa. 



The aecidium has only recently been distinguished from 

 the uredo. the sori of the two stages being mostly very similar, 

 and determined by the manner of the production of the spores, 

 as just indicated. It is somewhat remarkable that in the 

 Recidium stage there is no peridium, hence, according to the 

 characteristics adopted in this paper, the genus form is Cceonia. 

 not Uredo or JZcidinm. 



Ph. fragariee, (DC.) Rossm. 



II., III. Hypogenous. Uredosori small, circular, without 

 paraphyses, scattered: uredospore elliptical or obovate. echinu- 

 late. each borne upon a pedicel. 14-16 by 16-21 ^: teleutosori 

 scattered, rather large, circular, prominent, powdery, chestnut- 



