194 Illinois State Laboratory of Natural History. 
uredospores subglobose: or oval, sharply echinulate, 18-22 by 
21-27 »; teleutospores clavate or clavate-obovate, constricted, 
apex more or less strongly thickened, truncate, obtuse or vari- 
ously pointed, narrowed below to the rather thick pedicel, 
smooth, wall rather thin, 12-21 by 33-54 »; pedicel somewhat 
colored, short, half the length of the spore. 
Opaque, spadiceous, depressed, spores oblong-ovate, narrowed into 
a slender pedicel.—Persoon, Syn. Fung., p. 227. 
On leaves of Polygonum amphibium: Champaign, July 24; 
McHenry, Aug. 25, 1291, IL, IIL, Aug. 26, 1814, IT., 1331, 
2404, IL, IIL; Lake, Aug. 27, 1844, IL, IIL, 1347, II.; Kane, 
Aug. 80, 1871; Cook, Sept. 5, 1489; Lee, Sept. 9, 5758, IT., III; 
Stephenson, Sept. 13, 5800, IJ., IL., Sept. 21, 6062, IL, N1., 
6063, II., III.; LaSalle, Sept. 16, 1560, Sept. 19, 1593, Sept. 28, 
6224, IL., III.; JoDaviess, Sept. 20, 6013, II., III, 6014, IL, 
TIL; Ogle, Sept. 22, 6111, II., TII.; Henry, Sept. 28, 1703, IL, 
IIL; Fulton, Oct. 1, 1788. P. Virginianum: Rock Island, 
Sept. 26; Adams, July 14, coll. C. A. Hart. 
The pedicels of the uredospores are long, and appear in the 
sori of both states like paraphyses, but the teleutosorus not fol- 
lowing in a uredo sorus has none of them. 
There is some question about the identity of the Puccinia 
on Polygonum Virginianum. The sori are similar, but the te- 
leutospores are more irregular in shape, the apex more com- 
monly truncate, the epispore thinner, and the cell contents of 
different appearance. But there does not seem to be sufficient 
reason to separate this as a species or even named variety. 
Uredoforms have been collected on Polygonum acre and P. 
Pennsylvanicam, without, however, the teleutoform. On the 
former host the appearance is much like those described, but 
on the latter the pedicels of the spores are stronger and more 
persistent. 
P. aletridis, B. & C. 
IL, III. Amphigenous. Sori rather small, scattered, often 
very numerous; uredosori somewhat prominent, powdery, cin- 
namon-brown, teleutosori little raised, long covered by the epi- 
dermis, blackish; uredospores subglobose or oval, sharply echin- 
ulate, wall thick, 18-24 by 21-27 u; teleutospores clavate, ob- 
