142 Transactions British Mycological Society. 



The sori are hypophyllous. The fungus has not been previously 

 described on this South American host species. The Senecio 

 Smithii had apparently been growing for some time on the island 

 and no information regarding its origin could be obtained. It 

 is interesting to note that there are no pines on the island and 

 the nearest are more than ten miles distant on the island of 

 Mull. This appears to indicate that the fungus, under these 

 conditions, can exist through the winter in the absence of the 

 aecidial stage. 



CoLEOSPORiUM Petasitis Lev. 



Uredospores and teleutospores on Petasites japonicus 

 F. Schmidt and P. palmatus A. Gray. Dawyck, Peeblesshire, 

 August 1923. 



The fungus has not been previously found on these hosts in 

 Britain, but has been recorded on P. japonicus in Japan. This 

 appears to be the only record on the Calif ornian species, 

 P. palmatus. Coleosporiuni Petasitis has not been found in 

 America and it appears probable that infection of P. palmatus 

 has taken place from the fungus on P. officinalis which is com- 

 monly found in the neighbourhood. 



Caeoma saxifragarum DC. 



Aecidia on Saxifraga hypnoides L. Collected by Greville in 

 June 1822, on Ben Venue, Perthshire. 



Pycnidia scattered, rather fiat, about -i mm. high, -2 mm. 

 wide. Aecidia scattered on stems and leaves, amphigenous on 

 the latter, surrounded by the ruptured epidermis, -^--y mm. 

 diam. ; aecidiospores globose, angular-globose or ovate, densely 

 and minutely verrucose, 17-20 x 13-20 ix. 



It is probable that this belongs to some species of Melampsora 

 but no species of this genus is recorded on this host by 

 Sydow [Monog. Ured. iii). Somewhat similar caeomata on 

 Saxifraga aizoides and on S. oppositifolia are known to belong 

 to Melampsora reticulatae and M. alpina respectively, and it is 

 probable that the other host of the fungus under consideration 

 is one of the alpine willows. This caeoma has been recorded on 

 Saxifraga hypnoides by Dietel {Verzeichn. sdmml. Ured. 1888, 

 p. 26) in the vicinity of Leipzig. 



The specimen is preserved in the Herbarium of the Royal 

 Botanic Garden, Edinburgh. 



Aecidium pseudo-columnare Kiihn. 



On Ahies pectinata Dochfour, near Inverness. Collected by 

 Mr G. Robinson, Oct. 192 1. 



Five different aecidia have been described on the silver fir. 

 Of these Melampsorella Caryophyllacearum Schroet. [Aecidium 



