Arthur: Cultures of Uredineae in 191$ Yl> 



Agropyron, followed by telia June 1 1. On the Elytnus only a 

 few uredinia developed, not observed until June 23. A study of 

 the uredinia and telia on the Agropyron disclosed the characters of 

 Puccinia montancnsis. Field observations by Dr. Brenckle of 

 North Dakota, Mr. Garrett of Utah, and Mr. Bethel of Colorado, 

 independently reported, associated aecia on Lithospermum, Onos- 

 modium, and Phacelia, with Agropyron and Elytnus rust, but 

 material sent to establish the connection by cultures failed to 

 yield results. Subsequent herbarium studies leave little chance 

 for doubt that Puccinia Agropyri has its alternate form on Ra- 

 nunculaceous hosts, while P. montancnsis has its alternate form 

 on Hydrophyllaceous and Borraginaceous hosts. 



Two former attempts at culture of P. montanensis 23 are shown 

 by a reexamination of the original material to have been made by 

 using P. Agropyri, and not P. montanensis, as published. 



4. Uromyces Hordei Tracy. Telial material on Hordeum 

 pusillum Nutt., sent by F. McAllister and B. C. Tharp from Aus- 

 tin, Texas, was sown March 15, on Nothoscordium striatum and 

 Ornithogalum umbellatum, and again March 30 on the latter host, 

 with infection only on the Nothoscordium, showing pycnia March 

 30, and aecia April 6, both strongly developed. 



When the report of culture experiments for the years 191 1 to 

 1913 by W. Tranzschel 24 came to hand, the account of the success- 

 ful growth of barley rust on Ornithogalum umbellatum sug- 

 gested the renewal of a study of the correlated American species 

 of Uromyces, U. Hordei Tracy. There is no morphological dif- 

 ference between the uredinia and telia of the latter species and 

 those of Puccinia anomala Rostr. (P. simplex Eriks. & Henn.), 

 except that part, rarely all, of the teliospores of the Puccinia 

 are two-celled. Ornithogalum umbellatum is the Star-of-Beth- 

 lehem of the florists, and has escaped from gardens and become 

 a weed in the southern states as far northward as the Ohio river. 

 Aecia on it have not been reported for America, but they are 

 known on a near relative, Nothoscordium bivalve (L.) Britton 

 (Ornithogalum bivalve L.) , from Texas. An appeal to Dr. McAl- 



23 Jour. Myc. 14: u, 1908; and Mycol. 1: 11. 1912. 

 -* Mycol. Centr. 4: 70. 1914. 



