Mclampsora. 243 



On Populiis nigra, balsainifcra, iialka. 

 June to November. 



Biology. — Rdthay states that the recidiospores of this species are 

 ^c. clematidis. I have applied the germinating teleutospores from 

 P . pyramtdalis in four cultures to Cletnatis viialba, but could obtain 

 no result. Schroter thinks that C<xoma allioriDii, in part at least, 

 belongs to this Melampsora ; I have tested this statement by culture 

 on AlliiDii ursinitDi, but without result. 



Melampsora hypericorum. (D. C.) 



Uredospores — Sori orange, small, pulverulent, scattered, mostly 

 hypophyllous. Spores globose or elliptical, finely echinulate, 

 orange-yellow, 14-21 X 12-17/x. Paraphyses absent. 



Tciadospores — Dark brown, small, flat. Spores subcylindrical, 

 section polygonal, brown, 25 X 15^1. 



Synonym. 



Winter, he. cit, p. 241. Schrot, loc. cit, p. 363. 



Uredo hypericormn. D. C, "Flore frang.," vol. vi. p. 81. 

 Berk., " Eng. Flor.," vol v. p. 380. Cooke, " Hdbk.," p. 526; 

 "Micro. Fungi," 4th edit., p. 215, t. viii. figs. 174, 175. 



Exskcati. 

 Baxt., 42. Cooke, i. 118 ; ii. 321. Vize, " Fungi Brit.," 56 ; 

 " Micro. Fungi Brit," 127. 



On Hyperkum perforalum, andros(Bmiim, pidchruni. 



Melampsora betulina. (Pers.) 



Uredospores — Sori pale orange, small, roundish, numerous, flat. 

 Pseudoperidia persistent. Spores ovate or oblong, finely 

 echinulate, orange-yellow, 25-40 x 10- 20//,. Without para- 

 physes. 



Tekutosporcs — Sori at first yellow, then brown, at length black, 

 generally hypophyllous, flat, roundish. Spores cylindrical, 

 section polygonal, pale yellow-brown, 50 x 16/A. 



Syno7iyins. 

 Winter, loc. cit., p. 238. 

 Uredo populina, var. betulina. Pers., "Syn.," p. 219. 



