126 
drawn up from specimen in the herbarium of the United States North 
Pacific Exploring Expedition under Commanders Ringgold and Rogers, 
lS53-’56. Specimens labeled u Coleosporium pingue, L6v. 
Amphigenous, but most abundant on lower surface of leaf where the 
sori are confluent and irregularly effused ; on the upper surface the sori 
are usually small, fewer, and less often confluent; surrounded more or 
less perfectly by the much lacerated and conspicuous epidermis: in 
the effused patches irregular lines of this epidermis stick up here and 
there, marking more or less plainly the boundary of several or many 
irregularly confluent sori. Sori rather large, variable in outline, not 
definitely arranged, becoming pulverulent; light snuff-colored. Ure- 
dospores globose, short ovate, obovate to oblong elliptical, smooth or 
slightly roughened, pale yellowish brown to light brown; epispore one- 
half to almost 3// thick, but little or not at all thickened at the vertex, 
13-27 by 13-30//. Teleutospores oblong, ovate, oval to broadly ellip¬ 
tical, segments generally divided equally, usually not much constricted 
at the septum; vertex broadly rounded or occasionally narrowed, but 
not apiculate; epispore as thick as that of the uredospores, smooth or 
somewhat roughened, frequently a little thickened at the vertex, light 
brown, 13-37 by 20-54//; pedicel stout, but fugaceous, yellowish hyaline, 
once to twice the length of the spore; parapliyses intermixed with the 
spores, pedicel like, cylindrical, a little or not at all swollen at the 
rounded apex. 
The general appearance of this Puccinia en masse is that of the uredo 
stage of Phragmidium subcorticum , (Sclirank). It thickens and changes 
the shape of the leaf just as that does, and without a microscopic ex¬ 
amination would be passed over as Phragmidium subcorticum II , turned 
snuff* brown. Coleosporium pingue , Leveille, is merely the uredo of 
Phragmidium subcorticum. It is more than likely that Puccinia Kamt- 
schatkce will be found by careful seekers on various Rosa forms in the 
northern Rocky Mountains and along the northwestern coast of Amer¬ 
ica. 
Puccinia triarticulata, B. & C. Herbarium of the North Pacific 
Exploring Expedition, No. 130. Collected by C. Wright on Elymus 
mollis , Arakamtchetchene Island, Behring Straits. The original de¬ 
scription is not complete, lacking spore measurements and other notes 
of value. We may expect to find this species in Alaska and along the 
northwestern coast of America generally. The following more com¬ 
plete description has been drawn up from a type specimen: Sori linear 
to narrowly oblong, buried in the tissue, but forming a pustule on the 
surface of the host, finally bursting the epidermis and presenting a level 
dark-brown surface. Uredospores? Teleutospores two to three septate, 
00-100by 12-24//; pale brown, elongated, oblong, narrowly cuneateor cyl- 
indric-clavate, with an ovate, or rounded, or more or less obliquely trun¬ 
cate apex, constricted at the septa or not; epispore thin, smooth, vertex 
frequently thickened; pedicel short, stout rather dark reddish brown, 
