156 



Mycologia 



Michael Levine to the February number of the Torrey Bulletin. 

 Panaeoliis venenosits, P. campaniilatiis, P. retirugis, Clitocybe 

 dealhata, Mclanoleiica melanoleitca, and Peziza^ domiciliana were 

 discussed at some length and figured on three plates. 



In the Journal of Agricultural Research for September 2, 19 18, 

 Hedgcock, Bethel and Hunt describe a new rust, Cronartium 

 occidentale. The rust attacks the pinon pine, its alternate stage 

 occurring on species of Ribes and Grossularia. While similar to 

 the white pine blister rust which has caused so much damage in 

 the East, it differs in several particulars. The rust does not seem 

 to affect old trees to any great extent but is rather destructive to 

 young ones. 



Brown canker of roses caused by a new species of fungus, 

 Diaporthe iimhrina, is described by Anna E. Jenkins in the number 

 of the Journal of Agricidtural Research for December 16, 1918. 

 The disease can be produced by inoculation with either the pycno- 

 spores or with the ascospores of the host. Sanitation and spray- 

 ing are recommended as control measures. The disease has been 

 noted in the District of Columbia, Virginia, West Virginia, Geor- 

 gia and Connecticut. 



In the January number of Phytopathology M. Shapovalov dis- 

 cusses Some Potential Parasites of the Potato Tuber. Three 

 species, P enicillium oxalicum, Aspergillus niger and Clonostachys 

 rosea, are found under favorable conditions to cause considerable 

 damage to these tubers. From the discussion it is concluded that 

 there are many dormant enemies of garden crops which deserve 

 much more attention than they have been given in the past. 



Harter, Weimer and Adams publish the results of their investi- 

 gations on Sweet Potato Storage Rots in the Journal of Agricul- 

 tural Research for November 1 1 , 1918. . Seventeen different species 

 of fungi were found to be responsible. Of these the chief offend- 

 ers were : Rhizopus nigricans, Sphaeronema fimhriatum, Diplodia 



