84 British UrcdinecE and UstilaginecE. 



phores. There is no observable difference between the 

 sporophores produced from the teleutospore and those pro- 

 duced from a promycelial spore. These developments go 

 on until the nahrlosung becomes exhausted, when the pro- 

 mycelial spores and sporophores alike give off mycelium- 

 like tubes and fuse in various ways. In other words, 

 U. bromivora is characterized by its promycelial spores 

 growing into bicellular sporophores, which sprout directly 

 into new promycelial spores. True yeast-cell colonies do 

 not occur. 



In the teleutospores of this species which Mr. Soppitt 

 sent me I found that promycelia were freely produced in 

 water, and that they developed elongate, elliptical promy- 

 celial spores (10 — 12 X 3 — 4/^), which tended to become 

 vacuolate after they had fallen off, and afterwards emitted 

 pointed germ-tubes. I found that teleutospores gathered 

 in June germinated freely in September. 



U. olivacea (D.C.). — The teleutospores germinate,* after 

 a few^ hours in water, very much like those of U. longissima. 

 The promycelium is, however, so curtailed as practicall}- 

 not to exist, and the promycelial spores are really produced 

 at once out of the teleutospores without any promycelium. 

 These promycelial spores are variable in size ; each is sub- 

 fusiform, and measures from 5 to 20/i in length, and from 

 2 to }^^ in breadth. In nahrlosung they form yeast- 

 colonies. 



U. major, Schroter. — I gathered some specimens of this 

 fungus near Paris in the middle of October, 1887. The 

 spores germinated very readily when placed in water. In 

 twenty-four hours they had developed cylindrico-fusiform 

 promycelia (10 — 12 X 2^), which fell off from the teleuto- 

 spores (Plate VII. Figs. 19 — 22) much after the manner 

 of U. lotigissima. In forty hours these had attained a 

 * Brefeld, loc. at., pp. 129-133, t. x. figs. 9-26. 



