Teme. Leo, 
A CORRECTION. 
IN the June number of the BoTANICAL GAZETTE (31: 441) there was 
published by Ernst A. Bessey, of the U.S. Department of Agriculture, a 
review of Bulletin 49 of the Oklahoma Agricultural Experiment Station 
entitled 4 rhizomorphic root-rot of fruit trees. The reviewer made the state- 
ment that ‘‘ This has been shown by von Schrenk and others to be caused, - 
all probability, by a hitherto unidentified rhizomorph-producing fungos. 
The reviewer having failed, on request, to cite references to these publications 
of “von Schrenk and others” in support of his statements, and having 
thought it ‘inadvisable’ to correct the same when asked to do 80, the fol- 
lowing brief statements are submitted for the information of those apie 
November 6, 1889, von Schrenk identified the fungus in question as ‘one 
of the most dangerous tree fungi known, Agaricus melleus.”’ (Letter bas 
Horticulturist of the Okl. Agr. Exp. Sta.) Some more of the same material 
was submitted to Dr. B. T. Galloway, and under date of November 10, 1899, 
Dr. Galloway stated that “the fungus is the edible mushroom, Armillaria 
mellea.” (Letter to Horticulturist Okla. Agr. Exp. Sta.) In the Abate. 
Judd Farmer for January 12, 1901, von Schrenk says, “I suspect that possibly 
common in both Europe and America, the Agaricus melleus, - honey 
mushroom.” This last statement is quoted in the Budletin of this Station 
above referred to. 
These statements will show clearly the state of the investigations of “von 
Schrenk and others” at the time stated. Perhaps in the future we shall have 
from these sources some valuable publications regarding this subject, pe 
present none such exists to my knowledge. It is hoped the above sere 
tions will clear away some misconceptions and prevent the inference gc 
this disease had already been investigated by members of the staff of the 
Department of Agriculture. 
E. MEAD WILCOX. 
OKLAHOMA AGr. Exp. STa., 
Stillwater, 
226 [ SEPTEMBER 
