142 



JOURNAL OF MYCOLOGY. 



[Vol. 1, 



Plants of Adoxa Moschatellina were sent frouQ Iowa to Geneva, Y., 

 where was tested the suggestion that ^]cidium albescens, Grev . (a state 

 of Puccinia Adoxse DC, according to European botanists, but the latter 

 has not been found in this country) might be perennial in the subterra- 

 nean stems of Adoxa. The host plants were entirely covered with the 

 secidia, aad continued to harbor tuem till the leaves dropped off: in the 

 Fall. The pot containing the plants was sunk out of doors till the ensu- 

 ing March, when it was again put in the greenhouse and it at once started 

 into vigorous growth. Up to September no secidia had appeared, show- 

 ing apparently that albescens, Grev., is an annual. 

 "KoTES ON Black-knot." By A. A. Crozier, Ann Arbor, Mich., 1. c. 



First examina.tion (of Plowrightia morbosa) January 6, asci consid- 

 erably developed and spores beginning to form. First of March, most of 

 the asci contained spores, but unripe. Most spores the middle of May, 

 and they were furnished with thicker, dark-colored walls. Ascospores 

 continued to be formed till June 17. Knots on wild plum contained no 

 live perithecia. In a few cases the knot was found on Prunus serotina. 

 ''Proof that Bacteria are the Cause of the Disease in Trees 

 KNOWN AS Pear Blight." By J. C. Arthur, 1. c. 



''Notes on Some Injurious Fungi of California." By W. G. Far- 

 low, 1. c. 



An account is given of Peronospora Hyoscyami, De By., found by Dr. 

 Farlow abundantly on Nicotiana giauca. Grab. The latter "may perhaps 

 spread northward and eastward until it reaches the Gulf States, carrying 

 with it the Peronospora, but it is too tender to stand the winters further 

 north w^ithout protection. What is also to be feared is, that in advancing 

 e-dstward, the fungus may be communicated to some species related to the 

 N. giauca, as, for instance, Hyoscyamus niger, and thus be transported 

 north of the limit, where the N. giauca might grow, but where JST. Tabac- 

 cum (the Tobacco plant) is cultivated. But this supposition is almost 

 superfluous, because if N. giauca and its parasite are once introduced 

 into the Gulf States the parasite might attack the tobacco grown there, 

 and then pass on to Virginia and other States where Tobacco is the 

 most important crop." 



Peronospora Halstedii, Farlow, grows on Madia sativa near San 

 Francisco, thus extending across the continent. Puccinia Malvacearum, 

 Mont , was first seen by Mr. D. Cleveland in 1875, near San Diego, and 

 since by others there and elsewhere, on Malvastrum. Though this form 

 has been named by Prof. Peck, P. Malvastri, Dr Farlow seems to be of 

 the opinion that it is only a variety of P. Malvacearum, Mont. It is curi- 

 ous, how^ever, that this western variety and not the typical form, or 

 European species, was found on the hollyhocks at Santa Barbara. 

 "ExoBAsiDiUM WoRONiN." Von H. Karsten. Botanisches Central- 



blatt. Band XXIII, No. 12. 

 "EiNiGE NEUE Pilz-Species und Variet^ten aus Slavonien." 



