274 BOTANICAL GAZETTE. 



any mentioned in the description. The species is an Entyloma 

 rather than a Protomyces, as that genus is now limited. The 

 spores are much like those of the form on Ambrosia artemishe- 

 folia and Aster, differing only in being somewhat darker and 

 more angular, but the specimen of Peck was collected later in 

 the season than any of my specimens. The conidial spores of my 

 specimens are fusiform or slightly clavate, often somewhat curved, 

 and measure 15-20 p by 2-3 //. They sometimes appear to be 

 divided, but on this point I am not certain. I would propose 

 the provisional name of Entyloma Compositarum, while awaiting 

 further information with regard to the occurrence of conidia in 

 the European Ent. Picridis and its relation to Ent. Calendula 1 . 

 I am inclined to believe that Ent. Compositarum may prove to 

 be a more fully developed form of Ent. polysporum (Peck), the 

 relationship of which to Ent. Picridis needs further study, for, 

 although as distributed in Myc. Univ., the two have a different 

 aspect, I am not so sure that one is not an earlier and the other a 

 more mature form of the same species. 



Besides Ent. Compositarum, I have examined three other spe- 

 cies of the genus which are new to the United States. Prof. 

 Bessey, to whom we owe so many interesting discoveries of 

 Ustilaginece, sent me an Entyloma collected in September, 1878, 

 on leaves of Solanum or Physalis in Iowa, and later I received 

 from Prof. Arthur the same fungus on Physalis, also from Iowa. 

 In both cases there were abundant conidia and spores. The 

 conidia are at first short but become long and filiform, measuring 

 from 20-45 fi by 1.5-3 /■*. Contrary to what is found in most 

 species, the conidia on Physalis occur on both surfaces of the 

 leaves in circumscribed round spots, which are at first pale but 

 soon become black. The spores are yellowish or slightly brown 

 when mature, generally globose, on an average 12-15 (i in diam- 

 eter, and the surface, although sometimes smooth, is often 

 slightly undulate. There is already a Protomyces physalidis 

 Kalch. & Cooke, on P. Hornemanni from South Africa, described 

 in Grevillea, vol. ix, p. 22, Sept., 1880. It may be that this is 

 the same as the fungus from Iowa, but as no conidia are described 

 in the African species, our species may be called provisionally 

 Entyloma Besseyi. 



Two other species have abundant conidia as well as spore.*. 

 One was discovered on the leaves of Menispermum Canadense, in 

 Wisconsin, by Prof. Trelease, in August, 1881, and the other on 

 Lobelia inflata was collected by me at Giiead, Maine, in Septem- 

 ber, 1882. As far as I can ascertain, both species are unde- 

 scribed, although in the case of the one on Menispermum, it seems 



