149 



NEW OR RARE MICROFUNGI. 



By A. Lorraiii Smith, F.L.S. 



Mr. J. Ramsbottom who usually shares in the preparation of 

 the paper on Microfungi has until recently been engaged on 

 R.A.M.C. work in Salonica and has therefore been unable to 

 collaborate in the present contribution. Mr. W. B. Grove has 

 been publishing lists of Sphaeropsideae (Phoma, Phomopsis,etc.) 

 in preparation for a complete work on that group of British 

 Fungi. In view of its early publication, it has not seemed to be 

 necessary to publish here his new combinations, etc. 



Thanks are cordially given to Miss Roper and others who 

 have sent the records of new finds and especially to Mr. D. A. 

 Boyd who has as usual contributed much interesting material. 



PYRENOMYCETES. 



Nectria magnnsiana Rehm ex Sacc. in Mich. i. p. 294, 1878. 



The conidial stage [Tremella aurmitiaca) was found parasitic on 

 the tubercles of Diatrypella favacea, on dead branches of Betula 

 alba: Great Bear Park. Grove in Journ. Bot. Ivi. p. 286, 1918. 



Gnomonia Rosae Fuck. Sym. p. 122, 1869. 



Perithecia thickly scattered over the underside of the leaves, 

 covered by the epidermis, rather flat and round, about 300 fx in 

 diam., the beak slender, black, about i mm. long. Asci some- 

 what fusiform, tapering down to a narrow stalk, about 40-45 /u. 

 long, 6-8 /A thick, 8-spored; spores narrowly cylindrical about 

 18-20/X long, 1-2 fjL thick, not visibly septate, containing minute 

 guttulae. 



On decaying leaves of Rosa iomeniosa and on petioles of 

 R. spinosissima, Ardrossan and Stevenston, Ayrshire, and on 

 leaves of Fragaria vesca, Largs, Ayrshire; D. A. Boyd, Feb. 

 1918. 



Didymosphaeria conoidea Niessl in Oest. Bot. Zeitschr. 1875, 



p. 202. 



Perithecia scattered, becoming free, rather large, conoid with 



a flat base, slightly depressed at the apex, shining-black, leathery, 



the ostiole papillate or conoid. Asci cylindrical, stalked, 8-spored, 



