Jan. 190(3] Uredmeous Culture Experiments , Etc. 
9 
Pileus membranaceous, tough, sessile, reniform or subflabel- 
late, yellow-brown, subrugulose, the margin entire or incised. 
Lamellae radiating behind, rather broad, few, branched, reticulate, 
anastomosing, pallid. 
Growing on trunks covered with mosses; Hawaia. Pileus 
1-3 cm. broad, 1.5-2 cm. long. • 
UREDINEOUS CULTURE EXPERIMENTS WITH PUC- 
CINIA SORGHI, 190S. 1 
W. A. KELLERMAN. 
For three seasons previous, reports of infection experiments 
have been made dealing with quite a number of Rust species. 
This fourth report is, unfortunately, extremely brief; due to the 
fact that a Winter mycological collecting trip was made to Guat¬ 
emala that lasted into Spring. Also other work that had been in 
the meantime neglected, demanded much time and, besides, class 
duties in college were pressing. Consequently nothing was car¬ 
ried to completion this season except the Maize Rust experiments 
which can be outlined in a few sentences. 
First let me recur to the completed work with this species one 
year ago. At that time I secured what was taken to be infection 
of Maize plants direct with teleutospores (but below will be 
differently interpreted) ; and thereafter extended inoculation work 
was carried on with the uredospores so secured. 
SUMMARY OF PREVIOUS WORK. 
No inoculations with Maize Rust were on record previous to 
1904. Work for that season was published in the Journal of 
Mycology, 11:26-33, Jan. IQ05, and the point settled beyond 
possible doubt were these: That, using uredospores, the species 
was readily transferred to any and all the “agricultural species” 
of Maize; that teosinte ( Euchlaena luxurious) was also a host 
for this species of Rust (not before reported) ; that attempts to 
inoculate Sorghum vulgare, Saccharum othcinarum, and Trip- 
sicum dactyloides were unfruitful. 
AN AECIDIUM NOT DETECTED. 
In the progress of the work no Aecidium was encountered, 
though spores were taken from teleutosporic pustules that had 
been exposed all winter (on sweet corn), and with sowings 
1 Contributions from the Botanical Laboratory of the Ohio State 
University, XXIII. 
