1890.] occurring in the Neighbourhood of Simla. 89 



Remarks. — I have thought it best to name this fungus M. Salicis 

 Capreae ; but further research may show it to be different. 



COLEOSPORIUM, Leveille. 

 HEMICOLEOSPOKIUM, Schroter. 



1. Coleosporium Plectranthi, nov. sp. 



On Plectranthus Qerardianus, Benth. 



This host begins to be attacked towards the end of July, and in 

 August is in the uredo stage. The pustules are entirely hypophyllous, 

 and consist of little yellow heaps of the size of an ordinary pin's head. 

 The pustules sometimes exhibit a circinate tendency. The position of 

 pustules above is indicated on the upper leaf surface by yellow areas, 

 irregular in size and contour. Some leaves have very numerous areas 

 of invasion, whilst othei'S have but very few. The uredospores are very 

 pale yellow, oval, densely tuberculated, measuring on an average when 

 fresh and in water 24 X 17/x. The epispore is very thick; but I could 

 not detect any germ pores. They are given off in fairly long chains. 



Around these uredo pustules, early in August, some indistinct 

 smears of orange red colour may be seen, the commencing teleutospore 

 beds, and these rapidly acquire prominence. At the end of August 

 teleutospore beds are very numerous : they are strictly hypophyllous on 

 the uredo areas of invasion. The beds are bright orange red waxy 

 looking cushions. A uredo pustule is often, though not always, the 

 centre of a concentric arrangement of teleutospore beds. At the end of 

 August I put some uredospores and some sections of leaf blade through 

 teleutospore beds into water. The former did not germinate, probably 

 because they were too old ; but the latter produced a few oval sporidia. 

 I was unfortunately unable to make out the exact morphological form 

 of the promycelium ; but as far as I could see it was of the nature of a 

 Coleosporium one. The teleutospore beds are covered with a well marked 

 hyaline layer, and the top of each spore often presents a globular mass 

 of the same hyaline substance. The spore cells are usually single but 

 sometimes divided into two or three parts. The whole length of a spore 

 is about 24 to 28/a, and in breadth about 12 — 14^, (fig. 4, PI. IV). 



2. Coleosporium Clematidis, nov. sp. 



On Clematis montana, Don. 

 Clematis Bachanatiiwia, D. C. 



A Coleosporium on Clematis montana is not infrequently found about 

 Simla during August to October : it is not, however, common in the 



