1889.] 



occurring in the neiijlihourJiood of Simla, 



249 



surface, and these ai-e produced tlirougliout the winter, as I have found 

 them late in autumn, and very early in February, vs-hilst I have never 

 found the uredo pustules of the foregoing fungus after summer. 



The uredospores are circular, oval or pyriform, and, when just mois- 

 tened, vary from 17 /x in diameter to 26 x 21 /x. Their contents are pala 

 orange-yellow, but their coloured matter is characteristically confined to 

 the centre of the spore, leaving a colourless periphery about 2 /a in depth ; 

 the epispore is smooth (Fig. 3, h, PI. XIV). 



The teleutospores are adherent, falling off with a small portion of 

 stalk attached. The crown processes, as already noted, are remarkably 

 irregular, and the individual processes are often very long (Figs. 9, a, h, o, 

 PI. XIII and Pig. 3, a, c, PI. XIV). The freshly gathered spores, when just 

 moistened, have the following dimensions : — whole length 43 to 55 /t, 

 the mean being 49 to 50 /x ; the upper cell on an average 25 long, and 

 the lower 24 /u ; the breadth at the septum 8 to 12 or 14/*. These 

 spores, I found, germinated very freely in water so early as the 15th 

 Feburary, when most other teleutospores were still incapable of doing 

 so, and when the spores of the foregoing fungus only commenced to 

 germinate, without proceeding to the formation of sporidia. The lower 

 cell usually germinated first. Four sporidia are usually formed on each 

 promycelium ; these are oval and measui'e about 9 x 7 



C. on Aijrostis Ilooleriana, Manw. 

 A third form occurs onAgrostis Hooheriana with characters more near- 

 ly resembling form B. than form A. The teleutospores arc almost identi- 

 cal in form and measure 44 to 50 /a in total length, and 8 to 10 at the 

 septnm (Fig. 12, PI. XIV). In the absence of biological data, however, 

 it is impossible to say definitely whether all these forms belong to one 

 species, but until these are forthcoming they may conveniently be 

 grouped together. I have not seen any uredo form on Agrostis. 



22. Pdccinia Graminis, Pers. 



on Festuca gigantea, Vill. 



In certain localities this Puccinia is very abundant. The teleuto- 

 spore beds are very narrow and long, forming black lines on the upper 

 surface of the blade. These pustules, when not very numerous on a single 

 leaf, are generally found on the distal half, but otherwise the whole of 

 the upper surface is uniformly involved. 



Saffron-yellow uredopustules, mostly on the lower surface, precede 

 the formation of teleutospores. The uredospores are round or oval, and 

 orange-yellow, with an epispore beset with spines. The orange-yellow 

 contents are often aggregated in the centre, leaving the periphery filled 



