175 British Urcdineo' and UstilaHiiei^. 



Synonyms. 



Puccinia phragmitis (Schum.). Schrot., " Krypt. Flor.," vol. iii. 

 P- ZZ"^- 



Uredo phragmitis. Schum., " Enum. Plant. S?ell.," vol. ii. 

 p. 231. 



Puccinia antndinacea, Hedw. Cooke, " Hdbk.," p. 491 ; 

 " Micro. Fungi," 4th edit., p. 202. 



yScidiu/n ntmicis, Pers. Purton, vol. iii.. No. 1540, t. 26. 



yScidiitm ricbelhwi, Pers. Sow., t. 405. Grev., " Flor. Edin.," 

 p. 447. Berk., " Eng. Flor.," vol. v. p. 369, t. 26. Cooke, 

 "Hdbk.," p. 544; "Micro. Fungi," 4th edit., p. 199. 



Exsiccati. 



Cooke, i. 15, 25; ii. 81, 123; " L. F.," 59. Vize, "Micro. 

 Fungi Brit.," 161, 438, 439; " Fungi Brit.," 124. 



^cidiospores on Rumex conglomeratiis, obtusifolius, crispus, 

 hydrolapathu/n, Rheum officinale, May and June. 



Uredospores and teleutospores on Phragmites communis, July 

 to May. 



Biology. — The life-history of this fungus has been the subject of 

 considerable confusion, owing to its having been confounded with 

 P. niagnusiana. In a series of more than thirty cultures, made during 

 the years 1882 and 1883, it was proved that P. phragmitis has its 

 aecidiospores on the above-named Rumices and Rheum, and it was, 

 moreover, shown by several serial cultures that it does not affect 

 Rumex acetosa. For details, see Proc. Royal Soc, No. 228, 1883, 

 pp. 47-50 ; and (luar. Jour. Micro. Science, vol. x.xv., new series, 

 pp. 156-161. 



Puccinia trailii. Plow. 



yEcidiospores — Spots rounded, often irregular, purple-red, sur- 

 rounded by a yellow margin. Pseudoperidia cup-shaped, 

 wide, with torn, white, everted edges. Spores round, oval, or 

 irregular, white, finely echinulate, 20-40/x in diameter. 

 Uredospores — Sori rather large, elliptical or elongate, reddish 

 brown, pulverulent, amphigenous, without paraphyses. Spores 

 oval, subpyriform, sometimes nearly globose, brown, echinu- 

 late, 25-35 X 20-25^. 



