Jan. 1905 ] Sydow's Monographia Ur e dine arum, Etc. 
9 
No. 231. PUCCINI A EXPANS A Lk. This species has 
not yet been found in America. The collection on Senecio lugens 
from California (Sydow, Ured. No. 782) referred to under this 
species belongs to P. subcircinata E. & E. • 
No. 241. PUCCINIA TRACYI Sacc. & Syd. is undoubt¬ 
edly a synonym of P. Solidaginis Pk. The differences in appear¬ 
ance of the sori and spores are such as are found in all leptopuc- 
cinious species, and are due in part to the changes in structure 
which are correlated with the germinating or resting condition, 
for all such species possess the double physiological role of sum¬ 
mer spores and winter spores. The apical walls of this species 
vary from quite thin and rounded to enormously thickened and 
beaked. 
No. 268. PUCCINIA VERBESINAE Schw. was described 
originally from material collected in South Carolina, on “Verbe- 
sina, Siegesbeckia et aliis.” These host names cover Verbesina 
occidentalis Walt., Siegesbeckia occidentals L., and Verbesina 
•Siegesbeckia Michx., all referring to the same species, and now 
generally known under the first name. So far in my studies I 
do not find that the true P. Verbesinae Schw. has been reported 
upon any other than the type host. Its range is the southeastern 
United States, from West Virginia to Alabama. All other hosts 
cited by Sydow under this number should be referred to the pre¬ 
ceding species P. cognata Syd. The latter species ranges from 
Texas southward through Mexico, and is distinguished from the 
eastern species by somewhat larger spores of all kinds, and by 
teleutospores more inclined toward clavate, paler, and with per¬ 
sistent pedicels. The South American P. Schileana may belong 
with the number following, but unquestionably does not belong 
here. 
No. 290. PUCCINIA XYLORRHIZAE Arth. Since the 
publication of this species, collections have been received from 
other stations in Wyoming, one of which from Yellowstone Park, 
Aug. 30, 1899, No. 6780 (Aven Nelson), was distributed as P. 
Asteris, on Aster sp. Another collection on the same host was 
made by T. D. A. Cockerell, Sept. 24, 1902, at Las Vegas, N. M., 
and sent out as on Senecio sp. The colorless cells found in the 
sorus, which I at first called pseudospores, I now believe to be 
remnants of a peridium. Many species produce teleutospores 
within the aecidial cup, from the same mycelial mass that gave 
rise to the aecidiospores, and I see no objection to the view that 
in this species the aecidial stage is represented by a few loose 
peridial cells, and the uredinial stage by a few loose uredospores. 
No. 459. PUCCINIA SALVIAE-LANCEOLATAE Bub., 
is a synonym of P. caulicola T. & G., as the authors have pointed 
out in the appendix. 
