"276 BOTANICAL GAZETTE. 



In connection with the species of Entyloma previously men- 

 tioned, I would add that Protomyces Sagittarice, Fuckel, a spe- 

 cies whose systematic position is not well known, was found by 

 me growing on Sagittaria variabilis, Engelm., at Newton, Mass., 

 in the month of October. I am indebted to Prof. DeBary for 

 an authentic specimen of Fuckel. I received from Mr. J. 

 Fletcher, of Ottawa, some fruit of Potamogeton Vaseyi, Robbins, 

 attacked by a very curious fungus. The specimens had been 

 preserved in alcohol and consequently there was no possibility 

 of making the spores germinate. The fruit of the Potamogeton 

 was swollen and a section showed globular masses scattered 

 through the substance of the fruit. The masses consisted of 

 densely packed cells, the outer layer of which was darker col- 

 ored than the rest and regularly arranged, so that the cells, which 

 had the shape of short cylinders with rounded ends, had their 

 longer axis always in the direction of the radius. Beneath this 

 regularly arranged layer the cells were roundish-angular and 

 presented the appearance of parenchymatous cells. Having but 

 little material at my disposal I was unable to study the fungus at 

 all satisfactorily, but it appeared to me to be probably one of the 

 Ustilaginea', related perhaps to Sorosporium or Thecaphora. My 

 friend, Dr. Maxime Cornu, of Paris, has expressed the opinion 

 that the fungus in question belongs to a genus recently described 

 by him under the name of Doassansia. As the description of the 

 genus has not yet reached this country, I can give no further in- 

 formation, but would call the attention of collectors of Potamo- 

 geton to the existence of this curious fungus of which more 

 material is much needed. The fungus occurs also on P. pusil- 

 lus, P. perfoliatus, var. lanceolatus, and P. nutans, according to 

 Mr. Fletcher, whose description of the diseased fruit, when freshly 

 gathered, I quote for the benefit of collectors of aquatic plants: 



" The fruit was swelled out to more than four times its proper 

 size and was almost globular, of a greenish white color, spotted 

 with reddish-brown — later these fruits cracked and then the whole 

 soon decayed and a white mouldy growth was developed.'' 



While collecting in King's ravine in the White mountains, in 

 August, 1882, I found a curious fungus on Epilobium alpinum 

 growing on the borders of the torrent which falls from Mt. 

 Adams to the floor of the ravine. The Epilobium was infested 

 with JEcidium Epilobii, D. C, and on some of the leaves were 

 dark-colored spots which I, at the time, supposed to belong to 

 Puccinia Epilobii, D. C. A microscopic examination showed 

 'that the fungus was one of the Ustilaginece and very closely re- 



