Cultures of Uredineae in 1916 and 1917 301 



S. Jackson at Denver, Colo., May 26, was sown June 9 on 

 Abronia fragrans (family Nyctaginaceae) and Polygonum avi- 

 culare, with infection only on the Abronia, on which pycnia 

 began to appear June 15, and aecia June 19, in abundance. A 

 collection on the same host made by the writer at Ft. Collins, 

 Colo., May 23, was sown on Polygonum aviculare (family Poly- 

 gonaceae) June 23, giving pycnia June 30, and aecia July 3, 

 showing strong development. 9 



7. Puccinia Liatridis (Ellis & And.) Bethel. — After re- 

 peated assurances from Mr. E. Bethel that he had found a rust 

 on Koeleria cristata that would produce aecia on Liatris, and 

 had cultured it in his garden, and having received material for 

 study, successful sowings were made fully confirming his con- 

 tention. A telial collection made by Mr. Bethel April 22, at 

 Boulder, Colo., was sown May 4, on Laciniaria punctata (Liatris 

 punctata), showing pycnia May 15, and aecia May 22. Another 

 collection made by Mr. Bethel and the writer May 30, at Boulder, 

 Colo., was sown on L. punctata June 23, showing pycnia July 3, 

 and aecia July 7. The aecia have long passed under the name 

 of Aecidium Liatridis Ellis & And., but the telial form has only 

 recently been separated from the several other rusts on Koeleria 

 in a paper by Bethel, in which he gives an account of his cultures, 

 but which has not yet been received by the writer in printed form. 



Successful cultures in 1916 reported now for the first 

 time. — The following species have never been cultivated in 

 America or elsewhere, so far as the writer knows. 



1. Uromyces Sporoboli Ellis & Ev. (Aecidium alliicolum 

 Wint.). — On June 1 the writer in company with Messrs. L. E. 

 Melchers, G. W. Putnam and H. S. Jackson explored a number 

 of centers of infection of Allium stellatum showing aecia, found 

 in great abundance in a field adjoining the campus of the Agricul- 

 tural College at Manhattan, Kans. In one place a few uredinia 

 were found on seedling grass about three inches high, ascertained 

 to be Sporobolus vaginae florus, while over-wintered telia were 



9 For previous cultures see Bot. Gaz. 35: 19. 1903; Jour. Myc. 11: 54. 

 1905; 12: 16. 1906; 13: 197. 1907; 14: 15. 1908; Mycol. 1: 234. 1909; 2: 

 225. 1910; 4: 18, 54. 1912; and 8: 135. 1916. 



