Vol. 49 7 No. 7 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
JULY, 1922 
New species of Uredineae—XIV* 
JosEPH CHARLES ARTHUR 
In the tenth article in this series of new species an error 
was made in the determination of the host for Uromyces fuscatus 
(Bull. Torrey Club 45: 142. 1918), which should be Rumex 
paucifolius Nutt., and not ‘Polygonum alpinum All.”’ as 
printed. It was due to the persistent efforts of Mr, A. O. Garrett, 
who first thought the host of the collection which he made was 
Pentstemon (see Fungi Utahenses 244), that the facts in the case 
were finally established.. In July, 1920, Mr. Garrett visited 
the Utah locality at Gogorza, where he first collected the rust 
in June, 1915, and secured a flowering stalk of the host, showing 
it to be Rumex paucifolius. Upon my presenting the situation to 
Professor Aven Nelson, he looked up the field notes and the 
herbarium specimens collected in Idaho at the same place and 
time as the type of U. fuscatus and came to the conclusion that 
the host of this collecticn also was R. paucifolius. Only these two 
localities for the species are known up to the present time. 
The correction of these errors was complicated by a similar 
uncertainty and error in the host names for Puccinia Polygoni- 
alpini Cruch. & Mayor (Dicaeoma Polygoni-alpini Arth. N. Am. 
Flora 7: 385. 1920), for which only two collections were known 
at that time, a third one having been added from Greenville, 
California, since the printing of the Flora. Rumex paucifolius, 
host of the Uromyces, can not be told from Polygonum alpinum, 
host of the Puccinia, when the fruiting parts are absent, hence 
the difficulties that have arisen. 
* Contribution from the ou Department of Purdue University 
Agricultural Experiment Stat 
[The BuLLetin for June (49: 565-190: pl. 9) was issued July 8, 1922 ] 
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