1891.] 



A. Barclay — Additional IJredineae/rojJi Simla. 



223 



times closely amalgamated with rows on either side. Each spore of a 

 regular row measured about 16 x 13/a (PI. IV, fig. 4). I placed these 

 spores in. water, but they refused to germinate. 



This is apparently a new species of Xenodochus. It differs con- 

 siderably from X. carhonarius, Schlect. in which the aecidiospores are 

 28 — 16 X 20 — 15/x, and among which there are paraphyses. Moreover, 

 in the last named species the teleutospore rows have 10 to 20 loculi. 



MELAMPSOBA. 



Melampsora ciliata, n. s. 



On Populus ciliata, Wall. 



This host is abundant in Simla, and many are occasionally attacked 

 by a species of Melampsora. The uredo stage makes its appearance in 

 August or September. 



The uredo pustules are minute and discrete, but often very abun- 

 dant ; they are light yellow, and entirely hypophyllous, with scattered 

 yellow dots on the upper leaf surface. The spores are pale orange red, 

 mostly oval, pretty densely covered with spines, thick walled, and 

 measure when fresh 30 — 21 x 22 — 20/a (PI. V, fig. 15). They are 

 borne singly on stalks, and among them are some capitate paraphyses, 

 with heads very distinctly, and often greatly thickened at the free end 

 (PL V, fig. 15). 



The teleutospore beds are at first orange red, but become brown 

 later. They are entirely hypophyllous. The spores are in compact 

 beds and each spore measures 34 — 30 x 9 — 8ju. 



This fungus is, I think, different from any of the three described 

 by De-Toui. This will be apparent when the characters are shown 

 tabularly. 



Uredospores. 



Telentospores. 



Paraphyses. 



Remarks. 



M. Tremulae, Tul. 

 M. aecidioidefi, D. 0. 

 M. pnpulina, Jacq. 

 M. ciliata, mihi ... 



24-l5x 18-13 

 24-17x17-15 

 38-28x20-15 

 ;0- 21 X 22-20 



55-45x12- 



? 

 45_40x 13 

 84-30x9-8 



Clavate, 9-15. 

 Clavate. 

 Capitate, 20-17. 

 Capitate. 



ernphyllous. 

 hypophyllous. 



Melampsora aecidioides, D. 0. ? 



On Popuhis alha, Lin. 



Mr. Lace sent me specimens of the leaves of this plant collected at 

 an elevation of 8,500 feet on the 30th August. The under surfaces 



