204 Illinois Sfdto Tjahordtnnj of Natural JJisfo)-)/. 



20, 1165, II, III.. Aug. 23, 1289. U.. \U.: Lake, Aug. 27. 1349; 

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

 LaSalle. Sept. 2S. 6216. II.. IIL: Fulton, Oct. 1, 1765. 



This is r>trri)ii« Soir/hi, Schw. (N. A. Fungi [18341. 

 p. 295). The ahoA^e name was published in 1815 (see Rahh. 

 Krypt. Fl. I. p. 181). 



Phragmidium, Link. 



Teleutospores divided by two or more horizontal septa, 

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

 sori prominent, usually small, tufted, sometimes confluent in 

 patches: uredospores one-celled, borne (m deciduous pedicels; 

 secidiospores produced in vertical chains as in the true iEcidia. 

 but Mdthout pseudoperidinm ; uredosori and gecidiosori sur- 

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

 incurved paraphyses. 



All the sporeforms of the Fhra<jmidia are ordinarily hypo- 

 phyllous, the ascidium and uredo appearing rather early in 

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

 two latter are very commonl}^ 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 

 Bosacea% and so far as discovered, upon plants of the genera 

 PofcnfiUo, Biihns and Bosa. 



The fBcidium 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 Creonia. 

 not Uredo or yEcidii(in. 



Ph. fragarise, (DC.) Rossm. 



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

 ])araphyses, scattered: uredospore elliptical or obovate. echinu- 

 late. each borne upon a pedicel, 14-16 by 16-21 /t; teleutosori 

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



