204 IlJiiiois Sfafr Ldhonifori/ (ff Naiun/I Ill.^forij. 



20. llfir), IT., III.. Aug. 28, 1289. Tl.. III.: Lake, Auo-. 27. 1349: 

 Lee, Sept. 8, 5720, IT., TIT.: JoDaviess, Sept. 16, 5958, IT.. TTI.; 

 LaSalle, Sept. 28. 621(1 TT.. TIL: Fulton, Oct. 1, 1765. 



This is Pnrcinia SorgJrl, Schw. (N. A. Fungi [1834]. 

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

 Tvrypt. Fl. T. ]). 181). 



Phragmidium, Link. 



Teleutospores divided by two or more liori/.outal septa, 

 producing three or more cells in a single verticid 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 ^cidia. 

 but without pseudoperidium; uredosori and ascidiosori sur- 

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

 incurved paraphyses. 



All the sporef orms of the Phrdyiit.idia are ordinarily hyfJO- 

 phyllous. the a?cidiuni 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 

 Bosftcea', and so far as discovered, u]»on pbmts of the genera 

 Potentilla, Bid>iif< and 7?o.sy/. 



The fecidium has only recently been distinguislied from 

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

 and determined l)v the manner of the production of the s])ores. 

 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 Ca'ouKt. 

 not Uredo or JF^cidutni. 



Ph. fragarise, (DC. ) Rossm. 



IT., TIT. Hypogenous. Uredosori small, circular, without 

 paraphyses, scattered: uredospore elli]ttical or obovate. echinu- 

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

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



