BOTANICAL GAZETTE. 277 



lated to Doassansia Alismatis, Cornu, for an authentic specimen 

 of which I am indebted to the author of the species. The fun- 

 gus appears to the naked eye in the form of blackish convex 

 nodules about the size of a pin's head, which are collected in 

 groups, especially at the apex of the leaves, and visible on both 

 sides of the leaves. The nodules consist of densely packed 

 roundish-angular spores, those on the outside being dark colored 

 and those within lighter colored. The masses are surrounded by 

 a fine mycelium, but the development of the spores and their 

 germination could not be studied from the material which I col- 

 lected and, owing to the remoteness of the locality, it will be 

 difficult for future collectors to find the spot where my specimens 

 were collected. It is not impossible that the fungus has been 

 described by some older writer, but I have not been able to find 

 any trace of it. To mark the species it may be named tempo- 

 rarily Doassansia Epilobii. 



Doassansia Epilobii Farlow ad int. Spores densely packed 

 in globular or lobulated masses which are 80-200 /* in diameter. 

 Spores irregularly polyedral, approaching globular, 7.5-17 [i in 

 diameter, average 10-12; external spores blackish-brown, thick- 

 walled, outer surface cuticularized ; internal spores lighter col- 

 ored with thinner walls. 



Theeaphora aterrima, Tul., was found several years ago by 

 Prof. Bessey, on Carex, in Iowa. Collectors should search for 

 this interesting species in the Eastern States. Ustilago Sorghi 

 (Lk.) has been received from Dr. Taylor, of the Agricultural 

 Department in Washington, where it was found growing on cane 

 grown from seed imported from China, and it has also been found 

 by Prof. Trelease, on amber-cane in Wisconsin. Ustilago Gyn- 

 erii., Vize, of which I have examined specimens presented to me 

 by Dr. Harkness, is the same as Gymnosporiurn Arundinis, Corda, 

 and is to be excluded from Ustilaginea\ Tilletia stviceformis, 

 West. (Till. DeBaryana) was found by Mr. B. D. Halsted on an 

 unknown grass at Passaic, N. J., and by Mr. A. B. Seymour at 

 Granville, Mass. A curious form has been found by Prof. Bes- 

 sey on leaves of Polygonum (P. Pennsyloanicumf), at Ames, 

 Iowa. The fungus forms purple spots on the leaves, and the 

 spores are borne in projecting pustules nearly black in color 

 and hard instead of pulverulent. The flowers are also affected 

 by what seems to be the same fungus, and I have received from 

 Mr. Halsted flowers similarly affected, from New Jersey, but he 

 did not find the fungus on the leaves. The formation of the 

 spores shows that the fungus is an Ustilago, and regarding the 



