14 Fungi. 



an indication of the systematic affinities. The experiments were 

 made from March tili June. 



The results confirm in general those obtained by Marshai 

 Ward, but under different seasonal conditions. The success 

 of the infections made under these unfavourable conditions. is 

 regarded as accentuating the possibility of natural field infections 

 throughout the winter season. Tables are given summarizing 

 the results; some 20 species of Bromus were unsuccessfullv 

 infected with spores from both B. mollis and B. sterilis ; 12 

 species were successfully infected with spores from B. mollis. 

 but not with those from B. sterilis: 1 species (B. sterilisj was 

 infected by B. sterilis spores, but not by B. mollis spores; and 

 5 species were successfully infected with spores from both 

 B. mollis and B. sterilis. 



The view, is confirmed in these results, that the infection 

 capacities of the brown rust spores are profoundly affected by 

 conditions of formation. and also by the host upon which they 

 fall, that the Optimum condition arises from infecting a species 

 with spores formed on that species, which infection is least 

 likely to succeed with spores of a species on those farthest 

 removed in systematic position. 



G. .Massee and A. D. Cotton <Ke\v). 



Lewton-Brain. L., Cordyceps ophioglossoides [Ehrh.]. (Annais 

 of Botany. XV. 1901. p. 521—331. 1 Plate.) 



Two species oi Cordyceps grow parasitically on members oi the 

 Tuberaceae. The author investigated this species which was iound para- 

 sitic on Elaphomyces variegatus. 



The development of the spores in the ascus is described. Xo 

 karyokinetic figures were seen, but the nuclei in the ascus after repeated 

 divisions arrange themselves in 8 longitudinal rows; this is iollowed by 

 S longitudinal lines oi division in the protoplasm of the ascus, to form 

 the S filiform multinucleate ascospores. Transverse divisions of the 

 ascospores follow inmediately (or indeed contemporaneously with) the 

 longitudinal divisions oi the protoplasm. dividing the ascospore into its 

 component cells („sporidia" >. 



The connection between the parasite and the host was also parti- 

 cularly studied Unions between the two sets of hyphae were frequently 

 observed, but nothing in the naturf of a definite haustorium was dis- 

 tinguished. 



The mycorhiza oi Elaphomyces variegatus on Pinus is also 

 described, the author's observations on this diifer somewhat from the 

 aecount given bv Reeds. G. Massee and A. D. Cotton (Kew). 



Martin, Ch. Ed., Resultat de six herborisations myco- 

 logiques. Compte rendu des seances de lasociete 

 botanique de Geneve. (Bulletin de Pherbier Boissier. 

 Ser. 2. 1902. No. 12. p. 1024—1027.) 



Verzeichniss von Pilzen von verschiedenen Localitäten der Um- 

 gebung von Genf und im Kanton VYaadt, vorwiegend Hymenomyceten ; 

 ausserdem werden auch eine Anzahl Myxomyceten aufgezählt. 



Ed. Fischer. 



