Arthur: Cultures of Uredineae in 1915 139 
Agropyron, followed by telia June ii. On the Elymus only a 
few uredinia developed, not observed until June 23. A study of 
the uredinia and telia on the Agropyron disclosed the characters of 
Pnccinia montanensis. Field observations by Dr. Brenckle of 
North Dakota, Mr. Garrett of Utah, and Mr. Bethel of Colorado, 
independently reported, associated aecia on Lithospermum, Onos- 
modiuni, and Phacelia, with Agropyron and Elymus 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. montanensis has its alternate form 
on Hydrophyllaceous and Borraginaceous hosts. 
Two former attempts at culture of P. montanensis^^ 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 N othoscordium, showing pycnia March 
30, and aecia April 6, both strongly developed. 
When the report of culture experiments for the years 1911 to 
1913 by W. TranzscheF'* 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, N othoscordium bivalve (L.) Britton 
{Ornithogalum bivalve L.), from Texas. An appeal to Dr. McAl- 
23 Jour. Myc. 14: ii. 1908; and Mycol. i; ii. 
24 Mycol. Centr. 4: 70. 1914. 
1912. 
