July 1906] 
Field Notes on the Uredineae 
163 
was determined both by Sydow and Holway as the aecidial stage 
of Puccinia epilobii-tetragoni (DC.) Winter. On the same host 
but in a different locality Puccinia. scandica Johans, was collected 
three days later — the first American collection of this species. 
The opinion was then formed that the aecidia previously col¬ 
lected were connected with Puccinia scandica; and collecting in 
the same locality the two succeeding seasons has strengthened 
this opinion for the following reasons: i, I have never found 
teleutosori of Puccinia epilobii-tetragoni in this region, nor in 
any other at so high an altitude; 2. The aecidia reach their 
greatest abundance some time before the teleutospores of P. 
scandica appear; 3. Several specimens were obtained this past 
season in which both aecidia and teleutosori were found on the 
same plant, and even on the same leaf. The aecidia have, how¬ 
ever, been collected upon hosts upon which the teleutosori of P. 
scandica have not yet been found. 
Puccinia caricis-asteris Arth. — Just about dark on Au¬ 
gust 11, 1905, a collection was made of the aecidia of this species 
on Aster adscendens. The following day another trip was made to 
the spot for the purpose of finding the teleutosori if possible. The 
Aster plants were growing among a profusion of Carex festiva. 
An Aster bearing defunct aecidia was soon found; and the sur¬ 
rounding Carex was well infected. 
A few days later in another locality the aecidia were found 
on Aster Fremonti with abundant infection on the adjacent Carex 
festiva. A half mile or so away a collection had been made on 
July 11, of the aecidia on Aster ciliomarginatus Rydb. Inspection 
of the Carex festiva in this vicinity showed abundance of tel¬ 
eutosori. 
Aecidium monoicum Peck. — A collection of this aecidium 
on Arabis Drummondii being made July 22, 1905, in a locality 
where there was a large number of the infected hosts, a return 
was made to the place on August 21 to search for the alternate 
form. A host plant bearing defunct aecidia was soon located, 
and the surrounding plants were carefully examined with the 
result that teleutosori were found on Trisetum subspicatum, The 
two host-plants were intimately associated in growth, and further 
examination revealed the fact that the Trisetum rust was found 
only on those plants that were immediately adjacent to infected 
Arabis plants. Specimens of the Trisetum rust have been sent 
to Dr. Arthur, and he believes it to be undescribed. 
a Caeoma confluens (Pers.) Schroeter. — On July 3, 1905, 
a collection of this rust was made on Ribes vallicola. The host- 
plants grow along the banks of the mountain streams, and the 
lowermost willow branches frequently touch the Ribes bushes as 
they are swayed by the wind. A collection was made of a 
Melampsora on Salix in August, 1903, and again each of the 
following Augusts. It is the belief of the writer that these two 
