



i8 BOTANICAL GAZETTE [JULY 



ened up to 15 At, pedicel firm, thick, the length of the spore 



more or less. 



• Iowa and Wisconsin. On blades and sheaths of Phragmites; 

 uredospores in July, soon followed by teleutospores, which per- 

 sist through the winter. Specimens have been examined as 

 follows : 



On Phragmites Phragmites (L,) Karst. (/*, communis Trin.) Dec. 1883, 



III, Spirit lake, la. (/. C. Arthur)', Oct. 1884, HI. Mason city, la. 

 (£•. W. D. Holway)\ Oct. 1885, III, Decorah, la. (Sydow's Uredineen. 

 274, E, W, D. Holway) ; Sept. 1892, III, Ames, la. {G. IV. Carver) ; Aug. 

 1898, IL iii, Spirit lake, la. (type,/. C Arthur); May 1899, III, Arm- 

 strong, la. (7?. /. Cratty) ; Sept. 1901, III, Racine, Wis. (/. /. Davis), 



This species probably has a wider distribution than the above 

 series of specimens indicate, as it is likely to have been over- 

 looked. It occurs frequently intermixed upon the same leaves 

 with P. rubella. This was the case with all the above collec- 

 tions, except those from northwestern Iowa, at Spirit lake and 

 Armstrong. 



Cultures have not yet been made, but there are the strongest 

 reasons, based upon field observations, for believing that the 

 aecidial stage occurs upon Anemone Canadensis L. {A. Peimsyl- 



vanica L.) . 



The species is ver}^ 



Magn 



and even the supposed aecidial stage on Anemone resembles the 

 aecidial form of that species on Rafiunctihcs repens ^nd R. bulbostis. 



It is distinguished, however, by the slender, pointed teleuto- 

 spores, and by the more clavate and less roughened uredospores, 

 and probably by the aecidial host {Jig- 4, w and x). 



7. PucciNiA Arundinariae Schw. 1S22. Schrift. d.Nat. Ges. 

 zu Leipzig 1 : 72. 



Syn,: i8g8. Dicaeoma Arundinariae Kuntze. Rev. Gen. PI. 3:467* 



O. I- Spermogonia and aecidia unknown. 



II. III. Sori hypophyllous, rather small, nearly round, early 

 naked, ruptured epidermis inconspicuous. IL Uredosori cin- 

 namon-brown, pulverulent, without paraphyses ; uredospores 

 large, broadly elliptical or globose, 24-32/1 in diameter, wall 



