fee TWENTY-FIFIH REPORT ON THE STATE MUSEUM. 
the older authors, Zrichobasis Rubigo-vera Ley. In this con- 
dition it is the“*rust” of the grain fields. 
Variety brevicarpa las the sori smaller, the spores obovate or 
elliptical, generally obtuse, .0011’-.0015’ long, and the peduncle 
thick. It occurs especially on Panicum capillare, and may be P. 
emaculata Schw. I have received it labeled “P. striola,”’ but it 
certainly runs into the present species. It occurs oftener on the 
leaves than on the sheaths, buf the ordinary form is most abun- 
dant on the sheaths, sometimes rendering whole internodes black. 
37. P. arunpinacea Ledw. eed Brand. 
Amphigenous; sori subrotund or oblong, sometimes confluent, 
prominent, blackish-brown; spores oblong, obtuse or apiculate, 
strongly constricted, Hae in the middle, .0016~.0023' long, 
.0007—.0008' broad ; peduncle subhyaline, two to four times as 
long as the spore. 
Leaves of Phragmites communis. Montezuma marshes. Sep- 
tember. 
I have seen no American specimens with apiculate spores. This 
is P. Arundinarie Schw. 
38. P. srrtota Lk. Sedge Brand. 
Hypogenous; spots pallid or none; sori oblong or linear, some- 
times crowded, prominent, surrounded or partly covered by the 
ruptured remains of the epidermis, blackish-brown or black ; spores 
oblong or oblong-clavate, slightly constricted, obtuse, .0016—.002' 
long, .0006—.0007 broad; peduncle slightly colored, one-half to 
wholly as long as the spore. 
Leaves of various sedges. Autumn. Not rare. | 
In all my American specimens the spores are more clavate than 
in the European and scarcely to be distinguished from those of the 
next species. The spore figured was taken from authenticated 
European specimens. 
39. P. Caricis DC. Carex Brand. 
Hypogenous ; sori subrotund, prominent, scattered, sometimes 
crowded, blackish-brown or black; spores oblong-clavate, slightly 
constricted, .0013—.0018’ long, .0006° broad ; peduncle subhyaline, 
one-half to wholly as long as the spore. 
Leaves and sheaths of Carices. Autumn. Common. 
This species scarcely differs from the preceding, to which some 
authors unite it, except in the character of the sori and the slightly 
smaller spores. It is doubtful if it is more than a mere variety. 
The upper cell of the spore is subglobose. The Uredo form is 
Trichobasis caricina Lev. 
