Mela mpsorella . 247 



Exsiccali 

 Cooke,i. 119. Vizc, "Fungi Brit.," 59; "Micro. Fungi Brit," 2 26. 



On Vaccinitim my r till us. 

 June to November. 



Melampsora pyrolse. (Gmelin.) 



Uredospores — Sori small, round, globose, yellow, solitary or aggre- 

 gate on yellowish or brownish spots. Pseudoperidium at 

 length perforate above. Spores elliptical or subpyriform, 

 echinulate, orange-yellow, 26-33 ^ i3~^5/^' 



Synonyms. 



Schrot., loc. cit., p. 366. 



^cidium pyrolce. Gmelin., " Linne Syst. Nat.," vol. ii. p. 1473. 



Uredo pyrola. Grev., " Flor. Edm.," p. 440. Berk., " Eng. 

 Flor.," vol. v. p. 378. Johnst., "Flor. Berw.," vol. ii. p. 199. 



TricJiobasis pyrolcE. Berk., "Outl.,"p. 332. Cooke, " Hdbk.," 

 p. 529; "Micro. Fungi," 4th edit., p. 223. 



Exsiccati. 

 Cooke, i. 43S. 



On Fyrola rotundifolia and minor. 

 August to October. 



Biology. — Only the uredospores have at present been observed, 

 but from their general appearance this fungus can hardly be other 

 than a Melampsora (Schroter). 



IV. MELAMPSORELLA. Schrot. 



Teleutospores undivided, formed inside the epidermal cells (intracellular), 

 hyaline, confluent in wide-spreading masses. Promycelial spores hyaline. 

 Uredospores echinulate, enclosed in a pseudoperidium. 



Melampsora cerastii. (Pers.) 



Uredospores — Sori pustulate, scattered, small, round. Pseudoperi- 

 dium hemispherical, persistent, apically perforate. Spores sub- 

 globose, ovate or clavate, echinulate, yellow, 20-25 X 14-20/x. 



