1890.] occurring in the Neighbourhood of Simla. 107 



total length, and 18//. at the septum, which divides the spore into equal 

 parts : a nucleus is contained in each cell. The spores do not germinate 

 immediately after ripening. 



3. PUCCINIA NITIDA, nOV. sp. 

 On Polygonum amplexicaule, Don. 



I have never found this fungus actually in Simla ; but it is fairly 

 common at Mashobra, a suburb about 6 miles from the station. In one 

 locality many plants were abundantly attacked. Leaves usually bore 

 innumerable pustules, some brown and some black, mostly hypophyl- 

 lous, rarely epiphyllous. The former are uredo and the latter teleuto- 

 spore pustules. 



The uredospores are round to oval, light brown, spiny, and 22 x 24/a 

 in diameter when fresh (fig. 10, PI. I). 



The teleutospores are plump, rounded, deep brown, and very slightly 

 constricted at the septum. Each cell has a well marked nucleolar space, 

 and the free end is not thickened (fig. 10, PI. I). The germ pore of the 

 upper cell is clearly visible a little to one side of the summit. The spores 

 are readily detached, with usually no portion of stalk adhering. The epi- 

 spore over both cells is finely tuberculated. The spores are very variable 

 in size and shape : some of the smaller squatter spores measure 26/x in 

 total length, by 16/x at the septum, and 19/x in greatest breadth. Larger 

 spores measured 38 to 41/u. in length, by 18/x at the septum. The spores 

 do not germinate immediately after ripening. 



Remarks. — Saccardo notes three species of Puccinia on species of 

 Polygonum, namely, P. Polygoni, Pers, P. Bistortae, Strauss, and P. 

 mammillata, Schroter. I do not think the Simla species is identical with 

 any of them. At any rate it is not P. Polygoni, Alb et Schwein, because 

 the uredo sori in Simla are not irregular and not circinate ; the teleu- 

 tospores are not adherent, no portion of stalk remaining on the detached 

 spores; they do not contract towards the stalk; and are not thickened 

 at the apex. 



4. Puccinia Fagopyri, nov. sp. 



On Fagopyrum esculentum, Moench. 



At the beginning of October I found some stray plants of this host 

 growing on a weedy bank far from cultivated fields, largely attacked 

 with a fungus bearing black and dark brown teleutospore and uredo 

 pustules, all hypophyllous, with circular paled areas on the upper leaf 

 surface. 



15 . 



