140 Transactions BHtish Mycological Society. 



long, 21-28 )M wide at the widest part of the head, wall up to 

 9/x thick. 



M. reticulatae is distinguished from M. alpina and M. arctica 

 by its larger uredospores and paraphyses. It is believed to 

 form its caeoma on Saxifraga aizoides [cf. Sydow, Mon. Ured. 

 Ill, p. 362). 



Although only uredospores are present on the specimen there 

 appears to be no doubt that it is really M. reticulatae. This 

 opinion is strengthened by Trail's record of the discovery of a 

 caeoma on 5. aizoides in Scotland {Scot. Nat. 1890, p. 326, under 

 Caeoma Saxifragae). 



Melampsoridium Alni Diet. 



Uredospores and teleutospores on Alnus glutinosa Medic, and 

 on A. incana Medic, Craibstone, near Aberdeen, Oct. 1922. 



M. Alni appears to have been first recorded in this country 

 by C. O. Farquharson in 191 1 in the vicinity of Aberdeen 

 [Ann. Scot. Nat. Hist. 1911, p. 240). The fungus was found on 

 A . glutinosa and identified as M. hetulinum. 



It has recently been recorded by Grove as collected by Boyd 

 in Ayrshire on A. glutinosa {Journ. Bot. 1921, p. 315). 



The present specimens were found on two-year seedlings of 

 A. incana grown from foreign seed obtained by the Forestry 

 Commission. A few seedlings of A. glutinosa were also infected. 



The fungus closely resembles M. betulinum. The small, yellow 

 uredo-sori are rather few and are scattered over the under 

 surface of the leaf; the uredospores are usually rather smaller 

 than those of M. betulinum. The uredospores of the latter species 

 are stated to be smooth at their apices while those of M. Alni 

 are echinulate over the whole surface of the wall but these 

 characters do not appear to be constant for all the spores in 

 either of the species. The teleuto-sori are hypophyllous and very 

 inconspicuous. 



Melampsorella Caryophyllacearum Schroet. 



Aecidia on Abies N ordmanniana Spach., Murthly, Perthshire, 

 March 1923. Collected by Mr J. L. S. Smith. 



Producing a small witches' broom similar to those on Abies 

 pectinata. Not previously recorded on this host in Britain. 



PUCCINIASTRUM EPILOBII Otth. 



Uredospores on Epilobium alpinum L. Collected by Mr J. R. 

 Matthews, Meall nan Tarmachan, Perthshire, June 1922. 



The specimens were collected at an altitude of about 

 3000 ft. The uredo-sori are amphigenous, generally hypophyllous, 

 scattered, very small in size and the rust does not produce any 

 discolouration of the leaf. The peridium has the usual structure. 

 Uredospores echinulate, 20-25 x 15 /a with hyaline epispore. 



