1890.] occurring in the Neighbourhood of Simla. 81 



draw attention to the resting property of the teleutospores which is in 

 strong contrast with the immediate germinability of the next species. 



b. HEMIPHEAGMIDIUM, Schroter. 



2. Phragmidium Rubi, Pers. ? 



On Rubus lasiocarpus, Smith. 



A Phragmidium on this host is fairly common. On the 21st Feb- 

 ruaiy I collected some leaves bearing both yellow uredo-like pustules 

 and black teleutospore pustules on separate green leaves. Both kinds 

 of pustules are hypopbyllous, in scattered circular pustules, indicated 

 above by a brownish red discoloration of the leaf, especially marked in 

 the case of teleutospore formation. I put some spores from each kind 

 of pustule into growing cells on the following day ; but whilst none of 

 the teleutospores from the black pustules germinated, several of those 

 contained in the yellow pustules did so freely, forming ordinary pro- 

 mycelia, dividing into four parts, each bearing a sporidium at the end 

 of a pointed sterigma (fig. 5, PI. I). The sporidia are round orange 

 yellow bodies, 8 to 10/t in diameter, the diameter of the promycelial 

 tube being 8/x. These latter teleutospores were among numerous uredo- 

 spores, and were orange red in colour as contrasted with the deep brown 

 of the former teleutospores, which would not at this time germinate. 

 The orange yellow teleutospores were evidently just formed, and, indeed, 

 bat for their ready germinability, would be described as immature 

 spores, the more so as they contain fewer cells than the brown spores, 

 namely, 3 to 5 cells against 5 to 7 in the brown spores. Curiously 

 enough the uredospores, which were in the majority in such pustules 

 did not germinate in the cultivations in which the young teleutospores 

 did. 



The uredospores are round pale orange yellow bodies, with numerous 

 club-shaped paraphyses among them. They are tuberculated on the 

 surface, and measure about 21/*, in diameter. I never succeeded in 

 observing their germination (fig. 6, PI. I). 



Later in the year, from July to December, fresh crops of black 

 teleutospore pustules are produced, without any uredospores. Some of 

 these later teleutospores, which are dark brown and many-celled (on an 

 average six-celled), I put into water on the 10th September, and now 

 they germinated very freely, producing immense numbers of sporidia 

 (four to each promycelium), round or pyriform in shape, orange yellow 

 in colour, and 10 to 12/i in diameter. These brown teleutospores 

 measure on an average 100 '8 x 37//. ; but of course they vary consider-- 



