Vol. 46 ; No. 4 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 

APRIL, 1919 
New species of Uredineae—XI * 
JosEPH CHARLES ARTHUR 
The preceding number in this seriest was issued in April, 1918. 
Studies since that time have shown that two species given there 
were founded upon a misinterpretation of the hosts. The material 
- submitted by the collector for Puccinia wyomensts (Bull. Torrey 
Club 45: 143) consisted of three culms of Scirpus americanus, two 
of them fertile. These were about a foot long, once folded, and 
were intermixed with two fragments of culms and about twenty 
pieces of leaves averaging six inches long, having a similar appear- 
ance. Not until after publication was it ascertained that the 
material was separable into culms of Scirpus and leaves of what 
is undoubtedly an Agropyron. The rust is wholly on the Agropyron, 
although the Scirpus is discolored and wrinkled in a way to simu- 
late the grass leaves. The rust proves to be Puccinia Clematidis 
(DC.) Lagerh., of which P. wyomensis thus becomes a synonym. 
Recently the collector has distributed (Barth. N. Am. Ured. 1999) 
what purports to be the type collection of this form, but which 
wholly consists, so far as the specimen coming to the writer 
shows, of Puccinia obtecta Peck, on Scirpus americanus. 
* Reprints may be obtained by application to the Botanical Department, Purdue 
University Agricultural Experiment Station, Lafayette, Indiana, under whose auspices 
the studies here reported were largely carried out. 
pecies of Uredineae I-X: Bull. Torrey Club (I) 28: 661-666. agg 
T New s 
(II) 29: 227-231. 1902; (III) 32: 1-8. 1904; (IV) 33: 27-32- 1906; ( 
1910; (VIII) 38: 


rch 10, 1919.] 
